I read your suggestion the first time, the only sentence is
$dqwindow should be extended to provide properties like most other mirc identifiers equivalent to the following alias identifier:
which is not describing at all what others properties you want or what are these 'mirc identifier equivalent'. So then I checked your code and it's using && instead of & it seems. All in all it looks like you are asking for the built-in identifier $dqwindow to return a $true/$false value if either of the bitwise comparison is true, which can be done in a custom alias easily then
