Question re Purchase orders against projects, through MRP

Creating a purchase order direct from a project will link the two, and then the goods are revieved the costs are booked against the project ok, but if MRP is run and calculates purchase requirements from the item requirements set against the project, but does not link it to the project, and the goods are booked into stock and then need to be consumed against the projects, is there anyway to get it to link the PO back to the project and then revieve the goods against it as standard?
Thanks