If you are running multiple ‘composers’ with the same XP and need to differentiate I suppose you could send to the Experience ID, then create a conditional for the PC name.
So the trigger would be: call is received AND pc name is “PCNAME”. Or if you didn’t want to use the PC name, you could use an excel doc to store a unique value for each pc that runs composer, and user a conditional to compare that cell when the call is received. It should be noted that re-deploying an xp ‘can’ overwrite the excel file though if you had made a change to it, so be wary of that. But you could build a little button within the XP that allows the user who runs composer to set that cell value, and therefore receive whatever “triggered” events they selected.