Forums Scripts & Popups how to put /trace results into variable

Okay now lets say I want to 'read' back in a 'list' of all the screennames that are the same, how would I go about that?

Format is: screenname[12345678_12345678@1.2.3.4]

Then have it output something like:
screenname is screenname[12345678_12345678]@1.2.3.4 (current) also using IPs: @5.6.7.8, @4.3.2.1, @8.7.6.5, etc.

screenname[12345678_12345678] will always stay the same, but the IP may change, especially if they log in from various locations.

This server is modified and does not let the user change their screenname or account info [12345678_12345678].