[xwiki-users] Multiple LDAP backends?

Hello everyone, We have XWiki set up to authenticate users against our Active Directory using XWiki's LDAP lookup feature. It works beautifully for our main office. However, we have several other offices, and they would like to use XWiki as well. The problem is that these users are in different domains, and use different AD domain controllers, which means we have to query those LDAP backends separately. It looks to me like XWiki only supports querying of one domain controller at a time. As a workaround until a more permanent solution can be found, I am creating local user accounts on XWiki for these people and allowing fallback authentication against the local database. Of course, this setup will be problematic in the future with regard to password policy, so I'd really like to get LDAP functional for them as well. Any suggestions? Thanks-- we're really liking XWiki here. Dan