No we don’t have this effect available yet. 

What you could try is:

  1. Make another copy of the element you want to blur while in motion. Apply a gaussian blur to it from Sketch. 

  2. Apply the same position and motion tweens to both blurred and non-blurred elements. 

  3. Set the blurred element’s opacity to 0. Then during the motion segment, reduce the opacity of the non-blurred element to 0 and while setting the blurred element to 1.

Bonus idea:
stretch the element’s scale during the motion portion as well for an exaggerated effect.

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