Map editor question about triggers

With triggers, it's easy to set a condition for Bring Object to Object. However, this only checks for bringing one specific object (like a Hero unit that you start the game with) to the target object. Instead of specifying one specific unit that must be brought to the target object, is it possible to have a trigger condition where any generic trainable unit ()e.g. a Monk you train at a Monastery) is brought to an object (e.g. a Relic), then do whatever effects after that?