I thought I was a putz about computers, but after reading all of these posts from people who think they can get someone's personal home address from an IP, I am pretty sophisticated. Once you determine what the IP is, the best you can find is his ISP and city location. The only way you will get his personal information is by either getting the cops to get it from the IP (they investigate him) or you file a lawsuit (a John Doe suit if you don't know his name) and get a subphoena. You then go to the ISP and get the info. That is the only way you will find out who and where. Unless you got a friend who works for the ISP and can get it, or you can hack the ISP.