Triggering a template by changing a value in another table

Hi!

I want to trigger a template on a custom attribute, let's say "Person.isFunny", if a special group membership in PersonInOrg changes (INSERT/DELETE).

Is there a way to achieve this without using the well-known way via processes, job nodes and the INSERT/DELETE events?

So something like

'$FK(UID_Person),PersonInOrg.UID_Person$

Value = myFunction()

in the trigger defintion?

Thank you,

Norbert