Separate Song Library and Playlists Option

[Tcris1000]

Please add a way to separate playlists and the general song library.
Currently, all of the songs added to a playlist or added to the library are added to the library.
On iTunes there is a feature to separate the two to not have songs added to playlists added to the general pool of songs as well.
Example:

These songs added around the same time as the ones in my library do not appear here:

The setting to do this is on iOS in Settings>Music>>Library>Add Playlist Songs

I know it doesn't seem that useful but I would like to be able to have two different listening libraries