Yes, it’s possible to install NBS app for your G Suite domain users. To do this, you need to set aside users to certain Organizational Unit, move users to this OU and disable all other OU after installing the app.
1. Log into the Admin Console.
2. Go to "Apps"
3. Go to "Marketplace apps"
4. Select the app that you want to work with, go to the right hand side and click on the 3 dots (one on top of each other) click on "On for some" this will allow you to select the Organizational Unit that you want to allow the access to the app. Let me share with you the following Help Center article https://support.google.com/a/answer/182537?hl=en about adding Organizational Units.