...mmmh, not really.
There is a way of doing this, but it could be memory consuming. If you want to use 2 mutes, I guess you want to be able to mute 2 different section of your beat (like drums and instruments), you can send all the drums mixer tracks (like kick on track 1, snare on track 2, toms on track 3, etc...) in one mixer track (Track 8) and all the instruments mixer tracks (like bass on track 9, piano on track 10, strings on track 11) in another mixer track (like track 12)
That way, you need 2 mutes (one on track 8 and one on track 12)...