PingPlotter doesn't have any built-in facilities to help with this. There are a number of things you can do, though. An interesting guide on this can be seen here (I just used Google to find this - we have no affiliation with this site/page):

http://www.private.org.il/IP2geo.html

There are certainly tools available that have varying success at determining the location of a specific IP Address, some of them also doing traceroute. Google can certainly be your friend on finding some help for this.