Hi Rui Pedro,
I don't think any standard SAP configuration will help to restrict to schedule the order on particular capacity category. System just use the alternative resource and allow user to dispatch order on that resource. You may try an Enhancement CYPP0001 it allows you to change the sequence before finitescheduling. This is made possible by changing the contents of the sort
fields that control sequence formation. You can restrict the dispatch on different capacity category.
Regards,
R.Brahmankar