Short answer: not really.
Longer answer:
You can make a macro to order your Jounin move to a specific location, and that same order could tell them to switch to aggressive. You could then use that macro to order them to move right next to an enemy, and the aggressive part would mean they'd immediately attack when they got there. Or you could do two macros, one to order them to move next to an enemy, then another to order them to attack that particular enemy (I think there's a small chance that relying on the aggressive part might have them pick a different enemy than the one you moved them next to).
Or if they're already in battle and have their swords out, you can usually just do the attack order without needing the move order, and they'll run over to melee the new target (once the AI switches to melee mode it tends to keep meleeing til the battle is over).
However, you can't order them to use a particular attack - you'd just have to wait for the AI to decide to use it on its own.
For reference, the macro to go to the specific location would be:
/macro <macroname> petcompow Jounin goto
If you wanted it to turn aggressive at the same time, add 'agg' on the end of that (so it's saying 'goto agg'). And the macro to attack a particular target would be:
/macro <macroname> petcompow Jounin att
If we could order pets to use particular attacks, Mercenaries' Spec Ops would suck a little less 
So my Jounin has soaring dragon which at level 16 is the most powerful control power I have access to. Is there a way to write a bind or macro so Jounin will run into melee and use it when I command it?