The ACM workstations have guest accounts whose home directories are wiped at logoff.
Setup the ACM custom repo on the workstation first
pacman -Sy acmguestd
Follow post-install instructions
The guest account functionality relies on a package from the ACM custom package repo called acmguestd. The clean guest directory is located in /opt/acmguest-skel and the live home directory is /opt/acmguest. The guest directory is NOT on NFS. The guest account has to have access to run the guestd rc script as part of the loggout process. The loggout functionality is currently obtained with LXDM using the file /etc/lxdm/LoginReady.