If you want to add local users then create them on the server and as you try to connect to the server with this user they will come up in QMC and you can grant them licenses.
Ask your user to make a connection to the QMC from his local pc.
once done, he won't be able to access ,but now you'll find him in the QMC in the list of users and thus you can give him whatever authorizations you want to give.
