How to change the inventory picked G/L Cost from BSX to other OBYC assigned G/L

Dealr All

Business wants to differentiate the direct inventory cost  and return inventory cost by 411 Q  for a material

in testing Following observation are done :

Project return movement for 411 Q –for non valuated stock

In OBYC  VKA account modification : Debit key XXX  and credit key YYY

While doing 411 Q : XXX getting credited and Inventory G/L debited

In 411 Q project return stock for valuated project

OBYC VKA ,setting not triggering and inventory  G/L getting debited .

In both the scenario business want to transfer or picked the inventory g/l cost to any assigned G/L in OBYC during  411 Q 

I have searched the threads but couldn’t justify how can transfer inventory cost to any assigned G/L in OBYC or some other way while doing project return with varied price or for a material cant give two valuation class in master which can differentiate further direct stock cost and project stock cost respectively based on the way PO is created i.e. for project or for inventory

Thanks .