Add the option for Playlists to filter from file source

Hi,

Today, playlists are defined and filtered only by Video Sources.
But if two video sources has the same content, I have duplicates in the main library in kodi.

But my purpose is to create two separate playlist with similar content inside them.

So my request is to add the ability for playlist to filter their content from specific File Source (In addition for Video Source as it today)

Thanks.