I am writing a module which is processing a basic workflow to request a business card for our employees. We need to have some default persons there, e.g. default person in charge for finally purchasing, default person for approving a card if no supervisor was found, etc. Now how can I add something like a "pick a user from the DNN userbase" to my module settings? Is there something available in the DNN framework?

Or is there a possibility to add specific right to a module, here like "allow purchasing", "approve business card" etc., so I would assign the user there?

When a business card request is viewed, a normal employee should only be able to see the business card request, while the supervisor assigned will see some buttons to approve or reject etc.

Thanks for your answer, Sebastian.

You mean that every user than has to be in an administrator role/has to have administrative rights?

Can you explan that more or do you have an example how to do that?