Shoutbox

i don't know if it is possible or not as i don't really understand the underlying technology of messenger, however i just had a cool idea for a script, i keep encountering the problem below from time to time.

"if in messenger on my main PC and i then boot up my other pc it signs in my messenger account on the second PC which in turn kicks me out of my account on the main PC forcing me to have to sign back in on main PC."

can a script be built so if my main PC is logged into WLM it won't let me login at an alternate location without first either turning said script off or signing out of the Main PC first?