ACL如何管理

Almost similar question is unanswered here http://www.joomunited.com/support/pre-sales-forum/upload-file-front-end-and-define-access-level

I would like to know whether a registered user can upload via frontend and if so is it just for him, the gallery that he.she creates?还是其他人可以看到它，修改它，删除它等？

谢谢。

到目前为止看起来不错的扩展