CMIIW but, I don't think you could do it straight away, except probably if you are using gtalk or yahoo, then yo do file sending activity, then probably you will be able to see the ip of the other user.
But I remembered a story of my forensic instructor, tasked with tracing IP of an person through email, my instructor then send a link via email (spoofing a website name of some kind) then when the link is clicked, the page record the IP address.
↧