Not quite, Wyrm. All those things you described (Psychotropic IC, possession, and inhabitation) are all instant effects. They don't allow the person to switch back and forth like what we're seeing. It may be closer to PAB technology, but as it is (apparently) categorized as a virus, I'm looking more at Dissonant technomancer/sprite powers.
... I guess you aren't familiar with Judas Psychotropic, are you?
Sorry, Mirikon, but you're arguing from a Linear A perspective, where X must follow Y, and therefore Z. You aren't acknowledging any possibility of steps in the middle - things we simply haven't seen, and never will, because they are
assumed to have happened. We didn't progress immediately from PersonaFix Chips to Psychotropic IC - but all those middle steps are in the In-Character data path.
You also aren't paying attention to the parallels to the several different kinds of spirit bonds ...