Can I have several logins linked to the same customer account number?

As a business customer it is possible to register different email addresses for a customer number. Whilst registering, click the blue link in step 1: 'Yes, checkout using my Viking customer number'.
In the pop-up, enter your existing customer number and telephone number or zip code of the billing address and click on 'Find account'. Your new online account will be linked to your existing customer number.

Consumers can only have one login.