Yes, if you're using EVO-ERP, there are settings in SD-Q, MFG screen.
 
Allow PO to Edit GL Acct (A,D,B,N) (Evo-ERP Only)
 
If this is A then PO-A can edit the GL Account the line will post to.  If it is D, the GL Department only can be edited.  B allows editing of both account and department and N allows editing of neither.
 
Item Types for GL Edit
 
Indicate which inventory types the editing of GL information will be allowed.  Typically you may want to allow editing for type N (Non-Inventory) only.
 

Thanks!