How to setup GSA for each project has its own base?


I have a pack of projects in different niches but one language (en). The preferred TLD is a .com and this is easy setup. But!

I have a specially prepared bases for

project 1 = base1  (niche websites  list) 
project 2 = base2  (niche websites  list) 

Can I use (and how to set up) in one interface this idea?

4 project works in one time and get websites  list each project own website list? Likes this way:

project 1 from  folder C:/project1-base/identified
project 2 from  folder C:/project2-base/identified

Thank you !