Hi Kevin and thank you for your reply.
I created a categories of assistence that I called "General Assistance".
However, users must choose a category (whether parent or daughter) before creating a ticket. For example, if you put child categories under the "General Support" category, users would still see all categories and there would be no filter.
Then I also thought of creating internal filters that, based on the insertion of certain fields within the subject of the request, move the tickets to some specific second-level departments.
Would it be possible to do this with categories? And if it were possible, the user who uses the screen of viewing tickets open to the organization, can, after the filter has been put into operation, filter the tickets by the categories created automatically thanks to this filter?
Another possibility, if possible, is for users to log in and THEN, after the system has recognized that they are part of a certain organization, make only the existing category available as a choice.