@EMohaisen
If I understand you correctly, you are wanting to navigate to a screen by reference to the item. For example, if the Item had a title of "screen1" you would want to Navigate to screen1 and if it was "screen2" you would want to Navigate to screen2.
I am afraid this is not possible in PowerApps. There is an Idea in the Idea Forum that relates to this, should you wish to vote on it.
As it is right now, you would need to use logic in your OnSelect formula to do this, similar to this:
Switch(ThisItem.Title,
"screen1", Navigate(screen1, None),
"screen2", Navigate(screen2, None),
etc...
I hope this addresses your question and that I understood what you are intending to do properly.