Its generally ok on many sites for same IP address to be allowed to play in MTTs.
Agreed, which is why me and Debjani ditched Betfair the moment it blocked us from doing so - and not before we entered a tournament but once we were down to the $ paying places having been placed on the same table. But as I say this was years ago and it may have changed.
To simplistic an answer that one Mary, given George"s OP and my previous experience. However, Matt and Maxine"s experience last week may show that what George was told by Betfair could be wrong (surely not!) and that it may work. Someone will soon be shouting if it doesn"t.