In 2.08 you must change it each time. A table for chosing different addresses for a customer will be introduced in a later version of NV2. Not sure if it will be in 2.09 or 2.10.

NV2 version 2.09 is scheduled for release in the middle of January 2007.

You could for now set the destination of the invoice to display and alter the address in the excel spreadsheet and then print thus leaving the current NV2 information unchanged.