添加add_filter 到您的主题functions.php 文件

function myTags() {
$posttags = get_the_tags();
if ($posttags) {
  foreach($posttags as $tag) {
      if($tag->slug==\'your specific tag slug\'){
        if(is_user_logged_in() ) {
    echo \'<a href=\'.get_tag_link($tag->term_id).\' >\'.$tag->name . \'</a> \'; 
        }
    } else {
         echo \'<a href=\'.get_tag_link($tag->term_id).\'>\'.$tag->name . \'</a> \'; 
    }
  }
}
}
add_filter(\'the_tags\', \'myTags\');