Add Payment Method to Shipping Rule Option

It would be very helpful to be able to create a shipping rule based on payment type.

Our main use of this rule would be to assign a manual shipping method for orders that are being paid for by cash/bank transfer (i.e payment not received at time of order placement)

This would ensure the unpaid order can still be considered for stock in Storefeeder but not automatically shipped along with other orders before the cash/transfer has actually been received.

Many thanks!