Actually, MusicBee can be used on a network, for example with music content stored on a NAS. Just press shift during startup of MB (or tick Edit -> Preferences -> System ->show library selector on startup) and it will ask you which library to load. So, you can have one localy stored library and one remote, stored on NAS. Or, you can have a locally stored library that contains tracks stored on a NAS.
You are right i can access music files stored on a server however i want to store playlists on the server as well as music files.I.E: if i create a playlist of 'classic rock' my friend on another machine downstairs may retrieve the playlist and either play it or modify it then store the modified playlist on the server.