How about a Variable condition, comparing {JOB(Active|LastRun|MM)} with {DATEFORMAT(MM)}?
Haha.  I actually tried this on 6.2.1 and it didn't appear to work properly.
I had 5 rules,   Date minus 1, Date Minus 2, etc....    and one specifically for what you said for 'today', so if it matches,  Exit.
Maybe I did it wrong, but i was going to suggest that as well till it didn't work, so I didn't mention it.
Maybe something with the Active Job variable not being translated?  I couldn't tell, as the Debug information didn't go into detail stating what the variable was being translated to in the condition.
EDIT:  I should say... I had a condition set doing date math like mentioned, then I tried a single condition with what you suggested and I didn't have success.  Again, i may have done it wrong, I don't use many conditions yet.
Brian
                      Edited by user
                       
2013-05-03T13:27:41Z
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Reason: Not specified