Add custom authorization object to standard CDS DCL

I want to add my own authorization on a custom field , e.g. Sales Office in a standard fiori app Manage Sales Orders (F1873). I understand that this app has an access control using DCL based on CDS view C_SalesOrderWl_F1873. But is there any way I can add on to the standard DCL using a custom DCL? What is the recommende way to extend DCL in such fiori apps?

Best regards,

Sumit