Customer cut off time for order acceptance

Summary:

I read there is cut off time for the warehouse but is there a way to define cut off time for each customer?

e.g

Customer A has 12 pm ET cut off time.

This means if customer A orders after 12 pm for next day, order should not be accepted and requested date needs to be changed to day after tomorrow.

Customer B has 4 pm cut off time.

Customer B can be allowed to place an order past 12 pm and through 4 pm ET for next day's delivery.

Question 2:

How to stop accepting orders if they are not on customer accepted delivery days.