no that is not possible. Why do you want to do that? Each image gets a name assigned based on its frame in the timeline. So if you render backward the sequence would always play forward in any editor. If you want to reverse an animation, do it on the Geometry level via a timeshift node or with the rendered images in Post-processing.
Anyway thanks for the reply. I don't need to reverse the animation.
I want to render the same scene with 2 different machines in order to speed up the process.
The first one rendering in a normal way and a second one rendering backward.
Then i will stop both of them once they meet each other halfway at the same frame.