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Unix
If you are running KeyServer on Unix, you can set up KeyServer to use the names, passwords, and groups. The unix authentication information can be sourced from a simple unix password file, or access can be re-directed through Open Directory Services or a PAM module (when hosted on Mac OS X). Note that if OS X is using PAM, you will have to configure PAM to allow the KeyServer process to use it. One quick method for this is making a copy of /etc/pam.d/sshd called ks, but the details of the desired PAM authentication are outside our software scope. Configuration on something like RedHat or Ubuntu is done using the various Unix administrator utilities for that OS. Check the unix manual pages for pam details for your specific distribution.
When configured for Client authentication, even though group information is available for some purposes, the Unix module cannot assign computers into Divisions.