I dont know the answer specifically regarding a network, but I do know that when Adsense/Google bans a publisher, that means you are banned permanently, for life, and they almost always (often) find and close any new accounts you create unless you are able to really fool them (new IP address range, new computer/no leftover cookies, move to a new country, change your gender, etc).. I am actually curious to read/find out how this would work if you use a network.