[AM1986]

Is it possible to find someone's home address through their IP address or an account on a website like a forum?

[Kοala]

IP is just a general location. You have to call the service provider to get an exact address.

[Tonttunator]

It's not that accurate, but yes.

http://www.ip-adress.com/ip_tracer/

There might be a better site somewhere, but this is the one I use.