We need to give the restriction with Document type to specific role
AA document type we need to assign only ZACG1_S105 role.
We had completed the settings as mentioned below.
1. Create a new Authorisation group - F_BKPF_BLA - ZAAT
2. Assigned to Document type - OBA7 for AA doc type
3. In PFCG role ZACG1_S105 we had assigned ZAAT as below screen shot.