AFAIK you can, only based on the fact that I have an account on both of those as well. However I have never deposited or withdrawn at either, just goof around with freerolls
mainly now and then, and its usually during withdraw verifications they would probably look for that stuff.
I think most networks though allow you to have accounts on all skins, only one I know that doesn't is equity poker network.
How do you find TigerGaming, do they hold true to their cashouts as quick as they say they do?