How to create an application specific macro

[JMichaelTX]

@project_guru

But now I'd like to know if there's a way to do this within a macro itself. I would want to do this because often times I like to organize my macros by project not by application.

As @peternlewis suggested, you can use the Switch Case Action.
I have just uploaded an Action for this, complete with instructions. See:
###ACTION: Switch Case Based on FrontMost App