I think the answer could lie with the List Command but whether or not the pattern matching can be directed to protection flags is beyond my general trivia

since it already covers subdirectories with its ALL flag
Perhaps List could be altered to provide this function for you
For a work around just to give you a listing you could go
List ALL > Ram:List.txt
then cd to Ram:
grep -e -----wed List.txt > Ram:List2.txt
Of course this isn't perfect since some files will be missing the e flag and others might have one or more of hspa flags set but perhaps the following grep command line can be modified to just pass the line to output if the 5th character = a -
grep -e ^....-... List.txt > Ram:List2.txt