Hi everyone!
Is it possible to have a many-to-one declarative relation between two
classes and a _filtered_ backref?

I'm trying to build a tagging system for my bloglike application, and
to allow a user to apply private tags to posts of other people. My
classes are:
Owner
Post
TagAssociation
Tag

A Post has an Owner, while TagAssociation has a Tag, a Post and an
Onwer

Between TagAssociation and Post there's a many-to-one, and I'd like to
configure a "tags" backref so that it would handle only the
TagAssociations having the same Owner as the Post... Is this possible?

Many thanks!

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