How to link Gallery Slider Module to specific media library

Hello,

I use Divi Builder for the design of a firm website. I have different projects that are shown on the website. Each is shown with a project picture in a table. When clicking on one of the Project pictures, the project overview comes up, which includes the said picture and some general informations about the project.
My goal is to change the single picture in the project overview into a gallery slider, so that I can add more pictures of each project into the overview.
The problem I came across is:
When changing the picture in the overview into a gallery and selecting specific pictures from my media library, the changes that I made would not only show up on the one specific project overview but on every project I have posted so far.
I´m looking for a way to add a new specific library to each project, so that when I add the Gallery Module into the global layout of the project overview it automatically uses the assigned media library.
Maybe somebody knows how I can solve this Problem.

I would be very grateful for every help
Thanks in advance!