Block GI for Customer

I need to set the block Good Issue for delivery for a customer and assign to delivery type. So I created a delivery block and checked the GI Block only for this code and and assigned to delivery type. However, when I block the customer delivery using the code I assigned GI block only, it will also block creating the delivery. On the other hand, if I remove the customer block from customer master and include the delivery block code in the sales order instead or in the delivery header, the system will block the GI.

Is there a way that I can block Delivery Goods Issue by setting block in customer master?

Thanks!

Sue