mmm not sure i understand but i will give it a try.
1. Select the tag you went to send event to in the action
2. copy the event that will be used by all the gameobjects with target tag (make sure you set the event to global after)
3. paste event name in action at 'or send by..' space in the action
4. put the FSM name from the target gameobjects tag (usually if only one then it is 'FSM' which is the default name) into the action
Now you are good to go. bear in mind this is a solution for all gameobjects with target tag and not for object with target tag in only the collider zone. maybe you should change tag on all object that touch the collider (trigger event) then use this action for the new tag. Or use array list actions.
if you are using a script in your target gameobject then create a global event (and do above) then call the script method() with an another action.
hope it helps