Trigger(1){
Conditions:
Memory(-11421, At Least, 10000);
Bring("Current Player", "Terran Marine", "Location 3", At Least, 1);

Actions:
Display Text Message("Always Display", "<13><07>I<02>nfantry Upgraded!\r\n<13>-10,000 Minerals");
Kill Unit At Location("Current Player", "Terran Marine", All, "Location 3");
Create Unit("Current Player", "Jim Raynor (Marine)", 1, "Location 1");
Set Resources("Current Player", Subtract, 10000, ore);
Preserve Trigger();
}

Player 1's minerals would be at -11421 http://farty1billion.dyndns.org/EUDDB/?pg=entry&id=459, player 2's would be at -11420,, player 3 at -11419 and so on.

You probably also need to check the trigger owners, your trigger shows as "Trigger(1)" implying it's only owned by player 1? (or player 2 if it's a zero based number showing).

You also don't need EUDs to check minerals, you can use the accumulate condition.