How do I find someone's IP address?

Hi all,

Firstly i'm aware i've probably posted this in the wrong section, but not knowing where to post it, I figured someone would kindly repost it somewhere else for me anyway.

Basically i'm getting a lot of bullying and harrassment from a couple of people on a forum I discuss things on regularly, a similar site to this one, but owned by a company called YAF (Yet Another Forum).

I want to find out who these people are, as they seem to know me, yet I don't know them. If I could find out their IP addresses then maybe I could find out who they are and put an end to this problem.

Can someone tell me how I go about that please?

Thanks.

there are many of tool are online to check IP address

You would need to be moderator or admin on the forum to have access to ip addresses.