You mean in one of the three Limerick Affinity CU branch offices?
If so then I would imagine so.
I.e. that you could transact business in any of the five Affinity branch offices.
Not sure about other non Affinity CUs though.
Probably simplest to just ask them?
If you mean other Affinity CU branches, then yes you can. For other credit unions you will not be able to transact with them without having an account with them.