We're using the workflow plugin and would like to add a couple of categories which fall outside of the scope of software development (such as IT orders for example, which would be used only by the IT group) and we're worried that it would clutter the interface and confuse users with too many options.
One possible approach could be if you could somehow configure permissions for categories by using groups. So that in our case only members of the "IT" group would be able to see (and work with) cases of category "IT order".
Alternatively this could be solved by being able to configure whether a field should be displayed or not per category.