Proper supply wiring for CNC router 4.1 kW 3Φ motor and 120 V accessories?
The nameplate appears to be for the motor, but the motor must be supplied by a VFD electronic speed controller. You need to consider the current at the VFD input. The VFD input will not reflect the motor power factor, but will have harmonic current in the input current. Also, the torque rating of the motor will need to be reduced somewhat due to the input voltage being 208 volts rather than the 230 or 240 volts expected at the input of the VFD.

The neutral will certainly carry much less current than the other conductors. It certainly doesn't need to be considered as carrying the same current. It might be reasonable to treat the cable as having only 3 current-carrying conductors, but an electrical inspector might not see it that way.