MultiDB VIP and Pro Sites

Howdy all,
As I started to trim the fat on my MS site I have figured its probably best to start from scratch again.

Though I only have a handful of clients at the moment (who were brave enough to beta test) using it, as with everyone I plan big things, so thought it best to have a solid foundation to begin with.

My question is, Can you set the Multi-DB VIP to be used by a certain Pro Site level.
I.E. Freemium and Basic levels share a database and Premium and above levels have their own database.

I think I read something about it somewhere but can't find it anymore.

Cheers,
D