Probably not yet. Hopefully better tagging and filtering features could be implemented in the future, right now the devs are understandably busy with performance optimization however. Third party apps might be able to filter better client-side, too. Blocking entire instances for example (like lemmynsfw.com).

If you want porn gone from your All feed right now you have to manually block subs that allow it. It is possible, but will be tedious. You can turn off NSFW completely on your profile, but that also filters out non-porn NSFW posts of course.