In our current project, we need to group the settings ( connections ) by “users” or “groups”, for example, my customer A needs to have their connections and customer B needs to have its own connections, so, one does not see each other. I’m planning to do some work in my current fork to accomplish this, I just want to know if is there any already implemented solution for this case, thanks!

Not yet! There are some issues open that are going to be work in a few week/next month to enable using multiple workspaces in UI. At the moment you can create individual workspaces throught the API but the UI only use the standard one.