Hi Ashwin,
Here are two options to restrict the other user from receiving push notifications
1) Restrict Push notifications via SMP : There is an option in SMP to restrict feature policies. This happens for each application id created in SMP.
So, create two application id in SMP and use them for user onboarding . One for who access push notifications ,and other with push restriction.Both the application id configurations remains same but a change in feature restriction policy for users who should be restricted..
Make sure to use the application ids accordingly for user onboarding.
Admin Cockpit > Applications > Feature Restriction policies
2) Restrict device features via MDM : If you are using any MDM solutions like afaria, you may look at similar restriction at device level for restricted user groups .
Regards
Virinchy