How to restrict use to see some limited company and cmdb records

[Pratiksha]

Most of the cmdb tables can be read by CMDB read role. If you do not want certain class then you need to create access control on the respective class. 

[DineshS]

Hi @ashu1612 

You may want to explore data filtration plugin for this, which will allow you to restrict what subset of data users can see.

https://docs.servicenow.com/bundle/washingtondc-platform-security/page/administer/security/concept/d...

This blog on data filtration may also be useful : https://www.servicenow.com/community/developer-forum/data-filtration-practical-use-case-with-apis/td... along with https://www.servicenow.com/community/in-other-news/understanding-the-quot-data-filtration-quot-plugi...