Can I map two module at a time?

Can I map two module at a time?

Hello everyone,

Can I pick emails from my two modules and then inserting a new module?

An example could be: I have a module called Customers where I listed all of my customers data. I have different module called Sells where I store all my sells data. So now I want to email my customers who have purchased from my more than 2 times. Based on module I want to map with email as they have common. 

If the customer purchase from me more than two time I want to store their data in my new module called Active customers.