Yeah, pretty much every forum or forum-like software gives its moderators access to IP addresses. If you have a static IP address, that IP address can be matched to a location. Generally static IP addresses correspond to cable, DSL, or other broadband internet connections, as well as institutional internet connections (businesses, schools, universities, etc.). The alternative is a dynamic IP address, which you probably have if you're using a dial-up modem. A dynamic IP address _may_ be traceable to a specific location under certain circumstances.