[Qt-interest] Detect os in Qt StyleSheets?

[NoRulez]

Hello,

Is there a way to do something like 
QLineEdit[os=macosx] { color: red; }
QLineEdit[os=winxp,linux] { color: green; }
QLineEdit[os=win7] { color: blue; }

Thanks in advance

Best Regards
NoRulez