have not used this feature very much, but it seems easiest based on default cx install, to simply mount the networked directory containting desired accounting file to a directory that exists in your home directory using a command similar to this (ths assumes samba share):
mount -t smbfs -o username=hottie,password=foobar //server/dir /home/hottie/dir
this takes care of permissions etc at the mount point so QB's doesnt have to attempt it. This could easily be embodied in a script to run prior to QBs if needed.