How can I choose/set which Contact of an Account receives Invoice emails

How can I choose/set which Contact of an Account receives Invoice emails

Example:

1. In Zoho CRM, an Account has 5 Contacts.
2. I import all these into Zoho Invoice using  "Re/Import from Zoho CRM"
3. When I send an email all Contacts are added to the TO field.

How can I define a "Finance/Invoice" contact so that only the customer expecting an invoice receives emails?

Ideally, I'll like to set this in Zoho CRM. but any solution is better than none!

thanks