NMC user in a group with Networker read-only permissions

I would like to create a user that can only see networker configuration; this user cannot be able to start any backup and restore files. 

If I create a user in NMC, group "Users" and NMC role "Console user", I can add it in networker as a normal user, but it is able to run backup and restores. If I "unflag" "Recover Local data" and "Backup local data" privileges from Users user group properties I've verified that some scheduled backup with RMAN stop to work. Somewhere I've seen that is a expected behaviour.

To reach my goal to have a "readonly" user, I've thought to add a new group in NMC named "Readonly_group" and add the user to this group.

But at this point I'm not able to associate this group, and therefore this user, to Networker.

Anyone is able to give me any help on this topic please or suggest me a different way to reach my goal?

Thanks in advance for any reply