Is this possible?

[x0oo0]

Can you have trigger that only people playing with this online alias can activate?

 

[Berb]

You mean, if a player has a certain name?

I'm pretty sure that there's a simple way of detecting whether or not a game is on BNet or not (or "online") --you would have to search the forums though since I do not know what that is off-hand.

 

[x0oo0]

Yes, you had it right at the first line.

 

[PurgeandFire]

Just an example:

• Activate
  • Events
    • Time - Elapsed game time is 0.00 seconds
• ---- Allows you to apply the special powers after map loading ----
  • Conditions
    • (Name of (Player(1))) Equal to ActivatePowers
• ---- Change ActivatePowers to the name you want ----
• ---- Do this for all the players and all the name combinations ----
  • Actions
• ---- Add your actions here, this is just an example (that leaks) ----
  • Unit Group - Pick every unit in (Units in (Playable map area)) and do (Actions)
    • Loop - Actions
      • Unit - Explode (Picked unit)

The event is under "Time - Time Elapsed".
The condition is under "String Comparison". Go to "Player - Name of Player" then -> "Conversion - Convert Player Index To Player" and select the number.
Then just add your actions and you're done. =)