No.

RocketDMS is licensed for concurrent users and a license is required for the total number of different usernames that you require.

Usernames in use are automatically recorded. When the licensed number of users is reached further logins are rejected.

The administrator can 'release' usernames to allow for the use of different usernames as staff come and go.

The license covers the total NUMBER of different usernames in use at any one time. Licenses may be purchased as required, allowing you to start small and grow as required