Only allow technicians to set priority if they are associated to group

Hello!

We use the Priority Matrix to regulate the priority of a case, but we are experiencing issues where some users set a priority themselves because they overestimate the seriousness of a case, or misunderstand the function of what the priority means. We have regulated this by preventing requesters from controlling the priority through service templates, but if they are technicians, they sometimes adjust it anyway.

However, we have certain situations where we want technicians to set a specific priority, but this should be based on input from our IM.

Our ideal scenario would be that a technician can set a higher priority, but only if they are associated with the group to which the request belongs. However, the only option we can find is either to strictly follow the Priority Matrix or allow technicians to change it as they wish.

Is it possible to regulate this with any form of field and form rules, by roles, or any other means?

With regards

Rasmus