Import of contacts with multiple tags to CRM

Import of contacts with multiple tags to CRM

Hi guys,

I have following situation regarding multiple tags by import of contacts to Zoho CRM:

I have 7 contact lists that represent 7 different topics that need to be taged in CRM. I am going to use these topics in the future to send out the newsletter through Zoho Campaigns. The same contact can be present in different lists with different topics, and in such case should have multiple tags in CRM.  I could not find how I can import contacts with multiple tags to CRM? I have tried some options, but it didn't work.

Cheers, 
Elias