How to pull commerce_customer_address into the invoices view?
If I read your situation properly, it sounds like you want to establish a relationship from an order to the user account that created it and include a field from the user account in the Views results. If so, the solution is the core Drupal Commerce relationship Commerce Order: Owner. With this relationship, you should be able to put any property or field of the user account responsible for the order into your Views results.

This relationship is a part of the admin Orders View by default, so perhaps there's something else going on in your case. If so, it would be helpful to know more about your customizations.