diff --git a/src/components/SettingsView.vue b/src/components/SettingsView.vue
index 97c7f7f..abae45f 100644
--- a/src/components/SettingsView.vue
+++ b/src/components/SettingsView.vue
@@ -16,7 +16,7 @@ const galleryNameType = ref("shortName");
 
 const realAuthCode = computed(() => store.state.AuthCode);
 const weekUsed = computed(() => store.state.weekUsed);
-const isLion = computed(() => store.state.userId === 3);
+const isAdmin = computed(() => store.state.isAdmin);
 
 const connectionText = computed(() => ({
   connected: "已连接",
@@ -137,7 +137,7 @@ onMounted(() => {
           <span class="setting-label">删除本地授权码</span>
           <span class="chevron">›</span>
         </button>
-        <button v-if="isLion" type="button" class="setting-row is-button is-danger"
+        <button v-if="isAdmin" type="button" class="setting-row is-button is-danger"
                 @click="store.dispatch('resetUndone')">
           <span class="setting-label">重置未完成任务</span>
           <span class="chevron">›</span>
diff --git a/src/components/TaskDetailSheet.vue b/src/components/TaskDetailSheet.vue
index 32098aa..b406e1a 100644
--- a/src/components/TaskDetailSheet.vue
+++ b/src/components/TaskDetailSheet.vue
@@ -30,7 +30,8 @@ watch(detailGallery, (gallery) => {
   }
 });
 
-const isLion = computed(() => store.state.userId === 3);
+// Admin-only fields come from the backend's isAdmin flag, not a hardcoded id.
+const isAdmin = computed(() => store.state.isAdmin);
 const isDone = computed(() => (task.value ? task.value.status === "下载完成" : false));
 const isCollect = computed(() => Boolean(task.value && task.value.isCollect));
 
@@ -139,9 +140,9 @@ function submitTask() {
           <dd>{{ task.createTimeDisplay || "—" }}</dd>
           <dt>原始页面</dt>
           <dd><a v-if="task.link" :href="task.link" target="_blank" rel="noopener">打开链接</a><span v-else>—</span></dd>
-          <template v-if="isLion">
-            <dt>downloader</dt>
-            <dd>{{ task.downloader }}</dd>
+          <template v-if="isAdmin">
+            <dt>下载人</dt>
+            <dd>{{ task.downloaderName || `#${task.downloader}` }}</dd>
           </template>
         </dl>
 
diff --git a/src/components/TaskView.vue b/src/components/TaskView.vue
index 28c389c..2c31eb6 100644
--- a/src/components/TaskView.vue
+++ b/src/components/TaskView.vue
@@ -29,6 +29,23 @@ const sortType = computed({
   set: value => store.commit("_setSortType", value),
 });
 
+const isAdmin = computed(() => store.state.isAdmin);
+const downloaderFilter = computed({
+  get: () => store.state.downloaderFilter,
+  set: value => store.commit("_setDownloaderFilter", value),
+});
+
+// Options come from the current category, so the dropdown can never offer a
+// downloader that would filter the visible list down to nothing.
+const downloaderOptions = computed(() => {
+  const seen = new Map();
+  ;(store.state.currentTasks || []).forEach(task => {
+    if (task.downloaderName && !seen.has(task.downloader))
+      seen.set(task.downloader, task.downloaderName);
+  });
+  return [...seen].map(([id, name]) => ({id, name}));
+});
+
 const emptyText = computed(() => {
   if (store.state.category === "myDownload") return "您未下载过";
   if (store.state.category === "myCollect") return "您未收藏过";
@@ -97,6 +114,17 @@ async function refreshTasks() {
           <el-option value="shortName" label="简洁名"/>
         </el-select>
       </label>
+      <label class="filter" v-if="isAdmin">
+        <span class="filter-label">下载人</span>
+        <el-select v-model="downloaderFilter" size="small"
+                   class="filter-select filter-select-downloader"
+                   clearable placeholder="全部">
+          <el-option v-for="item in downloaderOptions"
+                     :key="item.id"
+                     :value="item.id"
+                     :label="item.name"/>
+        </el-select>
+      </label>
       <button type="button" class="chip-button" :disabled="refreshing" @click="refreshTasks">
         {{ refreshing ? "刷新中" : "刷新" }}
       </button>
diff --git a/src/store/index.js b/src/store/index.js
index 5ee50df..161ff9b 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -325,6 +325,8 @@ const mutations = {
         state.AuthCode = data.AuthCode
         state.userId = data.userId
         state.username = data.username
+        state.isAdmin = Boolean(data.isAdmin)
+        state.downloaderFilter = null
         state.isAuth = true
         ElMessage("验证成功,加载中")
     },
@@ -402,6 +404,8 @@ const mutations = {
     _setCategory(state, category){
         state.category = category
         state.visiblePages = 1
+        // 换分类后旧的下载人筛选可能在新分类里根本不存在，先清掉。
+        state.downloaderFilter = null
         confirmCurrentTask(state)
         sortTasks(state)
     },
@@ -413,6 +417,12 @@ const mutations = {
     _setGalleryNameType(state, galleryNameType){
         state.galleryNameType = galleryNameType
     },
+    _setDownloaderFilter(state, downloader){
+        state.downloaderFilter = downloader === null || downloader === undefined
+            ? null
+            : Number(downloader)
+        state.visiblePages = 1
+    },
     _setShowNameType(state, type){
         if(type === "shortName")
             state.length = state.shortLength
@@ -481,23 +491,23 @@ const state = {
     sortType:'shortName',                    //排序类型   shortName name createTime
     currentTasks: [],                        //当前任务
     weekUsed: {},                            //每周用量
+    isAdmin: false,                          //管理员（后端 validate 下发）
+    downloaderFilter: null,                  //管理员按下载人筛选，null 表示全部
 }
 
 const getters = {
     currentTasks(state){
-        if(state.isSearch)
-            return state.searchTask.slice((state.page - 1) * state.length, state.page * state.length)
-        else
-            return state.currentTasks.slice((state.page - 1) * state.length, state.page * state.length)
+        const tasks = activeTaskList(state)
+        return tasks.slice((state.page - 1) * state.length, state.page * state.length)
     },
     min(){
         return 1
     },
     visibleTasks(state){
-        return (state.currentTasks || []).slice(0, state.visiblePages * state.length)
+        return activeTaskList(state).slice(0, state.visiblePages * state.length)
     },
     taskTotal(state){
-        return (state.currentTasks || []).length
+        return activeTaskList(state).length
     },
     taskRemaining(state, getters){
         return Math.max(0, getters.taskTotal - state.visiblePages * state.length)
@@ -507,11 +517,7 @@ const getters = {
     },
     max(state){
         let max = 0
-        let tasks
-        if(state.isSearch)
-            tasks = state.searchTask
-        else
-            tasks = state.currentTasks
+        const tasks = activeTaskList(state)
 
         if(!tasks)
             return 1
@@ -531,6 +537,18 @@ export default new vuex.Store({
     getters
 })
 
+/**
+ * 当前视图实际要展示的任务。
+ * 下载人筛选只在管理员生效，作用于「我的下载/收藏/全部」三种分类的结果。
+ */
+function activeTaskList(state){
+    if(state.isSearch)
+        return state.searchTask
+    if(state.isAdmin && state.downloaderFilter !== null)
+        return state.currentTasks.filter(task => task.downloader === state.downloaderFilter)
+    return state.currentTasks
+}
+
 function getShortname(name){
     if(name === null)
         return null
diff --git a/src/styles/theme.css b/src/styles/theme.css
index c0f7a11..8a7bd5e 100644
--- a/src/styles/theme.css
+++ b/src/styles/theme.css
@@ -220,6 +220,10 @@ body {
   width: 90px;
 }
 
+.filter-select-downloader {
+  width: 96px;
+}
+
 .chip-button {
   flex: none;
   height: 30px;