If you are killed in PvP, you are not allowed to use that character for 2 hours.
You are not allowed to re-engage the player/players who you were fighting against when you died for 2 hours.
Simple, no loopholes.
That's... Not how it works. If you log your other character in the same system for sake of killing the one who killed you before (until your death time fades away), that's reengaging.