对我来说，一个有效的解决方案是在显示媒体库时向Wordpress查询中添加一个子句。

在浏览Wordpress数据库时，我注意到wp_posts.post_type = \'attachment\' 存储在wp_posts.guid 柱

add_filter(\'posts_where\', \'limitMediaLibraryItems_56456\', 10, 2 );
function limitMediaLibraryItems_56456($where, &$wp_query) {
    global $pagenow, $wpdb;

    // Do not modify $where for non-media library requests
    if ($pagenow !== \'media-upload.php\') {
        return $where;
    }

    $where .= " AND {$wpdb->posts}.guid LIKE \'%my-path-segment%\'";

    return $where;
}