Sale order should block when payment cards used

Hi,

1. When sale order created  with multiple line items using payment cards(Credit Cards), Sale order block will happen first time, up to this no problem
2. To release Sale order and get authorization user using T Code - VKM3, and user will create delivery and Billing.
3. But as per client requirement  Sale order, should be blocked after each line item delivered or Billed, if Sale order status is Open.
4. When all line items are delivered for a Sale order, Sale order block should not happen.

Please suggest.Thanks in advance.

Regards

SK