[Dovecot] user/domain-dependent autosubscribe ?

Newbie alert! Dovecot 2.0rc3

I've got autosubscribe working very well, but I need to make it dependent on the domain - e.g. domain example.com will have folders (a,b,c), while domain example2.com will have (d,e,f). Any hints on how to achieve that?

/Per Jessen, Zürich