There once was a thread about making a macro to heal and attack in the same macro. Everyone agreed it wasn't possible but as the thread wound down someone suggest you might do it with something like:

Code:
/click MultiBarBottomRightButton1
/click MultiBarBottomRightButton2
Button1
Code:
/castsequence [target=Coltimar],,,,,,,,,,,,,,,,,,,Lesser Healing Wave
Button2
Code:
/castsequence [target=party1target]Lightningbolt,,,,,,,,,,,,,,,,,,,
Obviously this example would be useless but would the functionality work? I've been reading on the WoW Macro wiki and the WoW API wiki but I dunno. Logically it's two different macros that you are running. I can't find that old thread to see if anyone posted any further on this idea.