It's best you e-mail support, just to be safe. I read once on here that FC will warn you if you try to log in with a different IP. It'll say something like "If you log in, you might risk your account being banned" or something along those lines. So to be safe, you should send in a support ticket.
My account was restricted about 1 1/2 years ago for two weeks. I was never told what I had done but it came as a real shock. If FC had not lifted the restriction, I would have been finished on this site.