Yes, but it depends on the power rating of the controller used in the system.

the controller is the device used to control the bldc motors.

now let’s take an example

if a bldc hub motor has a voltage of 36V with a power of 250W then which controller is suitable for the motor?

of course, the same power (250W) or even more (+250W) than that of the motor so that the system becomes more stable and reliable.

In short, the controller will operate efficiently.

but what will happen by adding one more motor having the same power (250W) with the controller!

Let’s understand 

a driver system must have to share the total load of 500W so that the two motors can run.

now, observe that the controller(250W) already is operating at its maximum limit and it is already sharing the total load of 500 watts (250W extra) which may cause major damage to the controller. Because it is not sustainable for two motor demands.

there are two possibilities either the controller will get heat up or it will get damaged. 

Then how to make it sustainable?

to operate these two Motors on one controller, we have to replace these existing controllers with the new controller which has a power rating of 500 Watt or more

so the conclusion is :

yes, we can run two Motors on one controller but the condition is the power of the controller should be equal to the power of the motor.