I doubt the board software provides that capability. The quoted text seems to be considered to be the post of the quoter (if that's a word). It can be done, but it would probably be a fair amount of work. It would have to parse the text of each post to see if it contained quote tags with a blocked poster within the first tag. It would be a bit more overhead.
One thing I did see as an add on once was on a Marlins board. If a post contained the text "Nate Bump," during the method when the post was recorded, it was changed to "Nate Freakin' Bump."
