Flame Darkfire

Recently two of my friends created nations on Cybernations from our school's internet lab. I had lent aid to both of them, not an incredible amount, just enough to get them going, and even initiated a trade with one. Both aids and the trade were canceled for cheating violations. I'm assuming the school has a single IP address for every computer there. My question is, can I never send them aid or trade with them again, even if I initiate either from my home computer?