Mobile accounts WITHOUT OS X server ?

Hi,

I’ve got a Windows + Mac network, with a Fedora Core server running Fedora Directory Server (LDAP).

I want my mac users to authenticate against the LDAP server, but I also want them to be able to use their laptop with the same account with there is no network (when they’re at home, for example).

I believe this is pretty much what mobile accounts allow you to do, but is there any way to setup a mobile account WITHOU an OS X server (using any LDAP) ?

PS : All this works fine with the Windows machines.

Thanks