Large scale operations typically use Equitrac, Equitrac Office or PrintSafe , Papercut or any other 3rd party software.for authentication, and the so inclined add swipe cards so no typing is needed at all.
As far as I know, there are no printers with built in customizable LDAP authentication from any of the manufacturers, which is why there are so many cross compatible 3rd party devices/software and lately, EIP platforms that can be accessed to bring the system to the device interface.