I Have installed domain access 6.x-2.1 and Domain Taxonomy 6.x-1.0-rc1.
the instalation is running well as my opinion :P.

I have 3 domain
http://www.domain.com
http://www.site1.domain.com
http://www.site2.domain.com

and then I created vocabulary
site and term {site1,site2} with settings is "required" so its vocabulary appears in all affiliates, thats OK, like I want.

Could I create a vocabulary such as vocab1 and term {term1-1, term1-2} with it's settings is "required" but I want this vocab1 only appears in http://www.site1.domain.com. not in all affiliates ???
If it's could, How to setting is ???