Synching local files in a specific playlist

[bmeliza]

I have a very large iTunes library of personal music (DRM Free) that are now in my Spotify local files.  I'd like to only include the local files within a specific Spotify playlist when I synch to my mobile - in other words, I have certain local files that I've added to some Spotify playlists (mixed Spotify and personal files) and I'd like to synch just those local songs to my mobile when I synch that playlist rather then having to move them to my mobile through some other means (e.g. iTunes or dropbox).  Any way to do this via Spotify, instead?  I've searched the Spotify help files and forums and don't see anything related to synching local files within a specific Spotify playlist - everything seems to be related to synching of local files in general - I know how to do that.  Thanks for any help/suggestions.