When TNT freezes one account for cheating, will they freeze all accounts on the same IP? What if they do not engage with each other?
A chain freeze does not always mean an IP ban. Really, the only way to tell if you've been IP banned is to make accounts on the IP that had the chain freeze and see if they get banned really quick. If they do, you're most likely IP banned.
Really, accounts shouldn't be interacting with each other if you want to be the safest you can. Some people do have multiples that interact, but they're on proxies/VPN's so the IP isn't linked.