Koha does not support multiple LDAP servers. Can it be one of the development option? For example, student accounts were stored in LDAP A, teaching staff accounts were stored LDAP B. Students and teaching staff have different access rights / privileges.
Hi Terence, Koha doesn't have a global road map, features get added as libraries sponsor them to happen. If you are insterested in helping this along, a starting point could be to switch this bug report to "Seeking cosponsors" or even "Seeking developer". The feature itself I think would be an interesting addition to Koha.