How To Track Down IP

I do hope someone could help me on this.

You see, some psycho has polluted our thread over at the Pinoy Exchange forums. We have paid no attention to her/him but lately that someone got more intense and she/he attacked us personally already.

Can I possibly track down the IP address of that person and eventually know who he or she is? I guess that person really had a serious mind problem to begin with, and I am just curious to know and where he or she came from (by the way, that person claims to be in US, his/her posts usually were made around 12am to4am Philippine time).

I am a peace-loving person and I just hope he or she would be sane again. Haha!