English to Spanish Tech/Engineering Computers: Systems, Networks

Hi! I need some help translating "customer cross-reference". The term is part of a postal company's computer system. It can be explained in these terms, I guess (this is from another page I found on the Internet, nothing to do with my client):

"When a new user to the web site places an order, a new customer profile is automatically created, and the user is immediately associated with that customer.

For each additional user for that customer, you do not want a new customer profile created; instead, you need to associate the user with that customer’s profile. You do so in the Customer Cross-Reference page."

Any ideas?

Thanks in advance!

Mirela