If you are using Terminal Server, Enterprise Server or Cloud Server, you have Profiles available:
https://www.nomachine.com/DT09K00058#3.4.
https://www.nomachine.com/DT09K00058#4.1.
Profiles can be for:
–system
–user USERNAME
–guest
–node NODE
–group GROUP
More information is in the Administrator’s Guide linked above.
For example, nxserver –ruleadd –class session –type shadow –value no –group groupname