modify particle

I’ve a doubt, with the particles.

I’ve a particles VFX done, and the Particles are moving as I wish and everything… but…

Is there a way to edit them?

I mean… for example, Iike the shape tha tI get, but there is one single particles that have a behavior or a position where I don’t want…

Is it possible edit the particles modify this single particles? And don’t do a render, modify it in photoshop and reimport it… I mean that… in the same toon boom… Is it that possible and how?