If the motor voltage is lower than the forward bias voltage, no current will flow.
If the motor voltage is larger than the forward bias voltage, then (assuming the LED max. current is 20 mA, per your spreadsheet), you would need 50 Ω of resistance for every 1 V that your motor voltage is above the LED forward bias. For example, if the motor outputs 2.2 (0.1 V above the LED forward voltage), then you would need a current-limiting resistor of 5 Ω; for a 2.5-V motor voltage, you would need 15-Ω resistors, etc.