It's which university here. Although, because of where I live, I think most ppl assume I went to one of the private girls' schools anyway. Where you live seems to matter an awful lot in Sydney too.
Clearly I lived in Sydney for too long because I have absolutely no interest in where anyone went to school but I think it's perfectly normal to ask where where someone went to Uni. They ask where you went to uni in the ACT too. Maybe because it's full of refugees from Sydney.