I'm trying to use Mountain Lion Server so my family can have separate logins via Screen Share to their iTunes.

Question

Using Mountain Lion Server so my family can have separate logins and connect via Screen Share.
Works great, each has their own home directory and permissions are perfect.
Now setting up iTunes for each with their own Library (not shared), thus keeping multiple Libraries.
I get this;
This Computer is already associated with an Apple ID.
If you download past purchases with your Apple ID, you
cannot auto-download past purchases with a different
Apple ID for 90 days.
What!
So what it is on the same computer, they are completely separate Libraries never to be mixed.
If this works, I only need to keep one computer up and running, instead of three.
Each can do their syncing/backup and connect to the various Airplay/AppleTVs I have around the house.
How do I fix this.
Thanks

Answer 1

Bottom line is you can't - easily.
You need to make sure that you log out of the server each time otherwise the ID is running. To explain, if you had a laptop with different people using it, your solution works fine. Each time someone logs in, the iTunes ID is different so it works as you can only have one person using the laptop at any one time.
Now, turning your problem inside-out, you want people to be able to log into iTunes concurrently to use their own version of the program with their own library. This does not seem to work and you get the conflicted ID error message. Even though iTunes is running under their own login ident, I have never been able to get this working reliably and was told that iTunes is NOT a network-aware application as it is designed to be single user.
The way I got around this was to login as XYZ and to make sure that the ID was changed in iTunes accordingly. However, it did not always work so I gave up with the whole thing.