Attribute declaration can only use simple types and constants. The compiler will not allow you to use expressions so your planned approach will not work.
You also cannot reference fields or properties, just constants. The closest you could get is something along the lines of
public const MagicNumberPropertyName = "MagicNumber";
public enum Operator
{
Equals
}
[AppAuthorization(MagicNumberPropertyName, Operator.Equals, 13)]
protected void Method() {}