Q: Is it possible to have multiple LDAP servers to auth against ?A: The Authentication :: LDAP and Active Directory plugin allows multiple LDAP servers to be configured in it.I have no idea if it checks all of them, or if it tried one until it reaches the server.Q: Can I muliply the ldap module and select it per user or group ?A: You can do whatever you want to do. But you'll likely need to rename functions in the copied plugin.