What we want achieve is to have Maintain/Edit rights on one case category type and only view for the other.
At the moment, while you have access to edit one type of case, you'll be able to edit all cases you have access to.
Ideas Administrator

We appreciate you taking the time to submit the product suggestion. Could you please expand on your description to describe the feature in more detail. We will monitor the votes and other feedback to consider prioritizing in our future backlog.

Dasani Madipalli - Program Manager - Microsoft Dynamics for SCM