I will say that, of the crazy drivers on Manila streets, the women are the LEAST of our problem. If there's a blinker engaged or a full stop at a stop sign (or hell, stop LIGHT), I will often look over and see a woman behind the wheel.
At any rate, it's pretty damn funny that they'd go to the trouble of painting a sign. You can't tell by the picture but this is a whole row reserved for females .... right next to the garage entrance.
Oooooh - I just had a thought though. What if they started doing this at clubs or restaurants but instead of just "parking for females" it became "parking for females in high heels"? OMG - I might actually get to wear those fancy shoes I'm always dreaming about.