Authorizations restrictions on grouping in SAP CRM WEBUI?

Dear Experts,

I have a security requirement to setup PFCG roles for CRM WEBUI, business gave the requirement to make the restrictions on grouping,

ex req1: 1st role should have access to manage X type grouping (number ranges) business Partners and other Y & Z type grouping should have only display.

ex req2: 2nd role should have access to manage Y & Z type grouping (number ranges) business Partners and other X type grouping should have only display.

when I check the type of grouping is different type of number ranges with respective of internal and external numbers nothing else. is there any relation with BP roles or other area?

I don't find any authorization objects which can be restrict on grouping level.

I would like to know how to make the restrictions on grouping? is there any SAP standard authorization objects which would help to restrict type of grouping?

Thanks & Regards,

Suresh