Cart rule for single customer

Hello

First time posting here.
Adding a cart rule for a single customer, when I search for the name of the customer it only displays the name, no e-mail or adress or other fields to specify wich customer it is.
In my case I have a big customerlist and many customers has the exact same name.

When adding the rule in web-admin it displays the email adress to the customer, and that is the only way for me to be sure that I have choosen the correct customer.

So it would be nice if you can search also on email adress when makeing a cart rule for a specific customer.

Thanks