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It’s not easy to follow your question, but the forum, as far as I’m aware, does not venture to act on IPs to perform profile vetting for campaigns. Perhaps the Campaign Manager you are talking about uses an external site for you to do your reporting (that would be a treat), and has decided to vet multiple participations from the same IP. If that is the case, that is his prerogative as he defines the rules of participation.
Edit: It is not permitted to participate with multiple accounts on the same campaign. How the Campaign Manager tries to ensure that differs from campaign to campaign, and more often than not, other users will advise the Campaign Manager if they find cases that try to bypass this rule.