Is there possible to trace an IP of some forum user?
in my forum there were a user who's very annoying and sometime's make a bad statement thought...
Are you an administrator of the forum? If you are, then most forum software includes utilities that state the IP address of the poster. Some only give the last IP address, some provide a record of IP Addresses.
As a fellow user in a forum, with no moderator or administrator privileges, maybe not. I've seen forums where the user's IP address when they posted was made available, but with the push for privacy protections a few years back, most of that ceased.
With that in mind, be VERY careful about what you intend to do with that information. Anything that even looks like revenge could get you into some serious trouble.