Different GL posting for Stock Item in Work Order

Hi,

At our Plant the  materials which are assigned a valuation class which hits at a specific GL.

Now requirement from Finance is that the cost of stock item when consumed should be separated based on GL codes.

Thus now we have 02 GL codes one for Normal maintenance (already used and assigned to Material) and one for Maintenance during Turnaround (new GL for this).

Now requirement:

When Work order created for Turnaround order type,  stock material reserved and when issued from Warehouse should hit the new GL.

When Work order created for Order type other than Turnaround,  stock material reserved and when issued from Warehouse should hit the old GL

What can be done?

Thanks

Faisal