multiple clients running simultaneously on same machine

[Jan]

Hi,

is it possible to have multiple clients running simultaneously on the
same machine?

I am experiencing problems with this setup (Ubuntu 11.04, compiled from
source):

User1 logs in, his iFolder runs

Then he switches over (without logging out) to User2, who also runs
iFolder.

The iFolder account for User2 works fine after a clean setup (User2 can
download his iFolders from the server), but the next time he logs in
iFolder just forgets that User2 already has downloaded the iFolder from
the server. So all the iFolders appear again as downloadable.

Any ideas?

Thanks,
Jan