In Wrath, special attacks like Crusader Strike will proc Seals. If the attack hits multiple people, the Seal will proc for each person (or have a chance to proc for those Seals which aren't a guaranteed proc).
This is pretty amusing with Seal of Vengeance and Hammer of the Righteous. HotR hits 3 targets every 6 seconds. If you are running SoV, you can actually build full SoV stacks on all three targets, refreshing them every 6 seconds.