Quick IP question

Hello i joined this forum in need of some advice.

I'am a member of another forum and have a valid account but due to reason i won't go into i need to make another account.

The problem is the site admin already knows my IP address from my current account and has it logged.

I want to make another account but i need it so my IP doesn't show up on the second one.

Is there anyway this can be done, i really need to join that forum with a new account while i still use my old one too but with different IPs.