Cisco Prime - Suppress Alarm for all non Infrastructure Links

Salute,

i need your advice for the following scenario: I have Cisco Prime creating Alarms for all Link Down events across all switches we have.

What i want to achieve: Having Cisco Prime creating Alarm only for Link Down events for ports in a specific port-group (Infrastructure Links).

What i tried to do: Create an Alarm Policy and suppress the alarms for Link Down events for ALL port-groups except one specific (Infrastructure Links).

My Problem: Obviously Prime do not support a negation of a selected port group (match all other except the one I selected).

We dynamically assign Infrastructure links to a port-group by a specific pattern in the description. But due to the System Defined port-groups they are assigned as well to other groups too.

How do you achieve to get alarms only for Infrastructure Links without disabling the the logging event itself at interface level on the switches?