In DaVinci Resolve I create smears by displacing the image. I achieve this by using a Displace node that's driven by a Fast Noise node.

I change the settings of the Noise in a way that makes sense with the movement of my character. In this case, I increase the X scale of the noise to make the image look like this:

This makes it look like my character is going to blitz along the Y axis if that makes sense. Of course I could change this with the other settings of the noise node. I could change the Angle parameter to rotate the angle of the smear or the direction of the movement.
I feel like the feature is lowkey already in Moho right there when you double click a layer, go to Vectors Tab, then Noise settings. I just want to be able to modify that noise.