No.
The law is 5knots, 50m from another vessel anchored, moored, underway, sailing, motoring, stationary or drifting.
Ferries are covered by an uplift clause that allows them to go faster than 5knots in many areas when within 50m of a vessel.
The purpose of the Auckland ferry lane is to prevent anchoring and congestion, although it also is a speed uplift area and it allows ferries to exceed 5knots within 200m of the shore line and within 50m of another vessel.