You can only get LANC zoom control on power zoom Servo lenses. A regular Canon type zoom for still cameras does not have Servo zoom control, so no remote control. You can add a follow focus gear to the zoom ring and use in if the their party external zoom servos and Remotely control that. Another option are,th new Cine zoom Servo lenses. Also B4 broadcast zooms have Remote Servo zoom control, using a specific 8 or 12-pin remote controller.
Also LANC control of zoom and focus has some delay in it.
Cheers