Yes, you are correct. There are two groups of people in play here:
- Multiboxers, the set of all players using software to coordinate multiple accounts, so one person can play several characters at the same time while still following the “one keystroke per action” rule
- Cheaters, the subset of multiboxers who use multiboxing software as part of a botting suite, to automate gameplay, usually to farm resources
Blizzard fired this shot at the second group, and obliterated them both.