firstly, codes are not IP locked, you cant do that, they use the username
second, i personally cant do it, it needs quite complex coding, but a quick google search should bring some results, eg:
http://www.thehelper.net/forums/showthread.php?t=56308that lets you use -save and -load, if you are any good at coding you could probably work something out from that, or just ask on those forums, they are one of the best for world editor help
Complex coding, for checking usernames? Hardly...
You just check the usernames of each player in a loop.
Name Conditions and Code
Events
Map initialization
Conditions
Actions
For each (Integer A) from 1 to 12, do (Actions)
Loop - Actions
-------- This checks each player's name for your name. --------
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
(Name of (Player((Integer A)))) Equal to Bobby
Then - Actions
Player - Add 1000 to (Player((Integer A))) Current gold
Else - Actions
Wallah? For more diversity, you can add different events.