I think sharing from the Kodi Client isn’t going to be all that tweakable. That and I think (but could very well be mistaken here) that with the setup your talking about all media would go through you Kodi client such as NAS>Kodi>LG. You might want to look into what UPnP servers you can run on your file share directly so it can directly transfer and will probably be more configurable. Otherwise for hiding sources take a look at this…