Hi,
To start with, what is your definition of 'automatic' posting? Posting performed through internal SAP process and not by front-end transaction? Or postings executed from an external system through BAPI, IDoc, etc.? In any case, AWTYP is not exactly the field to check for this distinction. It would be better to base your analysis on user's reference and transaction code. For AWTYP, though, it would be more the opposite: BKPF reference is give for front-end documents and BKPFF for others.
Regards,
Eli