Limit tags to creator/ node author?

I've found access_by_term module and try to use it for user based access control. But abt module can't limit the tags to its creator... So every user can set all terms to own account and so get all view permissions...

I try to limit usable/ visible tags to the own created terms to use it with access by term as a full access control solution. Any way to get it with community tags module? Another idea was private_taxonomy module, but there is no D7 port available.

Community tags use a database table with term, term creator and content tagged with term, right? Is it possible to implement permissions like that?

* use own terms
* use any terms

And terms can be multiple (same term but created by another user).

Maybe this with the access by term module could be the solution for my problem.