Restrict Particle force influence by Area For a crowd simulation, created by using force fields(Force) to generate limited particle displacement [simulating a "PARTING EFFECT"],how  can one restrict influence of the Effector to only the particles close to the Effector Object and not have any influence on the particles which are away from the Effector?  

In this simulation[Gravity=OFF],the force field is set to the lowest effecting Strength(= 0.1) to cause any resonable particle displacement,but all particles are getting affected.  

There is no effect on setting Field Weights by Weight Painting the particle emitting Object and with no way to assign separate Vertex groups of Emitter Regions in the same particle emitting object,how can one cause two different Particle behaviours in the same Particle System and using the same Force Field?
Use the Falloff on your effector, enter a power value (here 4.3) and limit it's maximum distance to whatever suit your scene.



Also add a drag force, and set it up like in the screenshot, to avoid the cubes flying away after they were pushed (the drag isn't shown in my gif just to be clear).