Yes there is a solution ... I had the same issue and came here for the fix . Oh well, I worked it out:
1 you can sign on to the iTunes Shared Network with another valid iTunes username and P/W eg yours or hubbies. (File - Home Sharing)
2 choose who will own the shared network at your home, and if all users use that network and it's Username & P/W you will be able to share their media if they have authorised your device (and visa versa) under (Store - Authorise This Computer) with the shared username and P/W for a max of 5 devices on the home network. For mobile devices, you will have to provide this data on he device in question when you try to join the shared network.
3 Note: each person will retain and use their own Apple U/N and P/W in the Apple Store on their PC
Hope that is clear ... A shared U/N & P/W of the shared home network, authorise each other's devices from iTunes and other devices whilst retaining individual log in to Apple Store iTunes using own U/N & P/W
Ironically, your own media may occur under the name 'This User' on say an Apple TV remote.