Select the users that will access this profile. If you don't select any users, this profile will not be accessed.
These are the options you will find in the Thinfinity® Remote Desktop Server profiles editor 'Permissions' tab:
If you want a user or a user group to access more than one computer, you need to create more profiles and then add this user to each profile.
The authenticated user will be able to choose which one of the available profiles to connect.