Hi,
Not only you can hide data on the user level (like Ganesh sais).
Such restrictions can be set eg. on a role level. Just assign 0comp_code to exact value in authorization (RSECADMIN) and then assign that authorization to the role in S_RS_AUTH (PFCG). see here Maintaining Roles and Authorization in BI 7.0 - RSECADMIN
Apart from this lots of combinations of restrictions of this kind can be created.
All you need to do next is to assign user to given role.
Regards, Leszek