Can events be linked to a group based on the country chosen for the address?

We'd like to be able to display events in our national groups based on the country chosen for the event address.

For example: A user creates an event (globally, not within a group) and chooses Germany as the country (address). We host a national group for all our German users and we'd like to know if there is a way that this event is then also displayed in that specific group.

Can this be done manually? Can it be automated?

Best,
Mike