Just if someone have more accounts here,he can registered in many campaigns with no worries to been busted,if campaign manager cant see ip addresses in to google participant list

Nice to see you're only concerned about getting caught cheating a campaign. Your account seems to have almost exclusively been farmed with games and rounds spam so I'm guessing the others have been too.
It would be a very nice feature if managers could get the IP of any participant,
They could if they made people sign up via an external site which logs IPs but sadly most campaigns don't care about alts even though the majority of them prohibit it.