Hi,
You have several ways:
-- either each object is responsible for sending events, in which case, each can send their own events.
-- the listener filters by tag using the action "Trigger event"
-- the listener catch all triggers, get the gameObject that triggered and do some checks, maybe by name, by tag, by layer, or by querying the object itself ( get fsm XXX action to access local variables on other fsm).
Bye,
Jean