Not currently, this is a use case that wasn't originally intended. The solution would be to allow negative values in the look-ahead spinner, which I will add for the next build.
A workaround is to set particle velocity in the desired direction, do the neighbor test using the velocity vector (instead of the particle transform axis), then clear the velocity afterwards.
A workaround is to set particle velocity in the desired direction, do the neighbor test using the velocity vector (instead of the particle transform axis), then clear the velocity afterwards.