Integtration with zoho CRM for multiple domains in one account

Integtration with zoho CRM for multiple domains in one account

Good day!

I would like to know how I can integrate multiple domains ( currently from UNBOUNCE) to one ZOHO CRM account. I would like to have separate leads and contacts collection. If I integrate with the existing API  Authtoken I will have all the contacts put together, what I do not want. 

Thank you in advance