Multiple Accounts Associated with One Contact

Multiple Accounts Associated with One Contact

I understand there is no possible way to associate multiple accounts under one contact without duplication.  I was able to work around this by creating a Lookup Field called "Contact Name" in the Accounts module.  However, now when we have Zoho CRM integrated with QuoteWerks, it is not able to pull that Lookup Field information.  Does anyone have any suggestions as to how to get around this without duplicating a contact? Does anyone else have this problem?