the category list of the customer is what the customer expected. The supporter should be able to have an own category list. At least it should be possible to change the category. But I would prefere two different lists.
The customer will have categories like "news, Content, Layout, ..." the supporter will have categories like "Module bugfix necessary, Coding support needed, can be solved myself, invalid, won't fix, ...) The coder category is only visible for supporters
the category list of the customer is what the customer expected. The supporter should be able to have an own category list. At least it should be possible to change the category. But I would prefere two different lists.
The customer will have categories like "news, Content, Layout, ..." the supporter will have categories like "Module bugfix necessary, Coding support needed, can be solved myself, invalid, won't fix, ...) The coder category is only visible for supporters