I think most of Ontario's restricted species are native and invasive species provinically. When you get into manipuical it is a completely different ballgame. If you live in the countryside, Ontario is probably the most lax province in Canada when it come to exotics.
Just last weekend NS had a council meeting on which snakes and lizards to ban. Fortunately, the herpers managed to compromise with some of the guideline like no snake over 3m and lizards over 2m along with the grandfather clause. It is not official yet.
I will see if there are any non-native species that can't be kept in NS though.