The administrator could install NoMachine on every virtual instance (‘NoMachine nodes’), and then add these nodes to the main server: Enterprise Server. Via manual selection, users would then select their desktop node once authenticated on the Enterprise Server. There is no randomly assignment of user to the session. Admin could configure/customize access to remote nodes using NX profiles.
The following resources may be useful:
Multi-node concepts in NoMachine – https://www.nomachine.com/DT07M00091#7
Profiles – https://www.nomachine.com/DT07M00091#3
For more information about Active Directory take a look here:
https://www.nomachine.com/forums/topic/only-allow-specific-windows-domain-users-to-login and
also here:
https://www.nomachine.com/AR01O00914
I would also suggest you contact our sales team. They will be able to go into more technical detail about your specific requirements.