I have tried in the past to use Tor in multi user environments like Citrix but it only worked for one user at a time. Has this changed with later versions? If not does anyone know if it could be looked into?
Tor can be used for several users at a time. Run Tor as daemon if you want, then you can proceed to run any network/internet software through Tor socks proxy:
torsocks *software*
For options about configuring and customizing the torsocks proxy, you can consult the torrc
config file.