Authorization group restriction

Hi ,

I would like to know how to restrict authorization group FCAR and FCAP.We could see it is related to F_BKPF_BES object .It seems the same authorization object should be given the following access

--display access for documents asigned to authorization group FCAP

--should not allow display for documents assigned to authorization group FCAR

If we restrict using FCAP (displays access)the second condition works fine but the first one it displays line items only for G/L accounts.Vendor line items does not get displayed.

Please let me know your thoughts on this.