From the forums:
"pulse looks like a good choice for a CI server for work. However, since we quite a few users, LDAP support would be crucial. Are there any plans for LDAP in the future (or preferably already in 1.0)? With LDAP support I primarily would like authentication against a LDAP server (with users set up in pulse), but having users be automatically created (if authorized) like in Fisheye would be even better. "

ref: http://forums.zutubi.com/viewtopic.php?t=6

Since we are pushing the user side of CI, we will need to allow for external user authentication systems such as LDAP.

ACEGI proivdes LDAP support so this should not be to much effort to integrate.