Can we create a feature that a discount can only be used when the customer is actually on the ticket?

Can we create a feature that a discount can only be used when the customer is actually on the ticket? Because I would like to have an employee discount feature and other member perks, but I want this feature only to be used when there is an actual person on the ticket from my customer base. I'm not sure if it is clear enough...

Unfortunately, the system cannot do this automatically. But you can manually assign a previously created discount to the registered customers during the sale.