I think Star used to have a similar rule, that if you have a same-day F ticket, you have access to "all lounges from point of origin to final destination"...but if you have a C ticket, it says "Business Class customers will be given lounge access by providing a boarding pass for the segments to be flown"...don't know if there's a subtle difference in there...but they did use these different phrases to describe...anyway, I don't seem to be able to find these phrases again anywhere now...

just curious, Zorro, if you were planning to go to The Wing, why didn't you take CX instead of TG in the first place from HKG-BKK ? I think CX has very good frequency too on this route ? or, even just HKG-SYD direct on CX (maybe you need to be in BKK) ?

I think CX is usually pretty good in bending the rules a little bit at The Wing, e.g. letting extra guests in...however, if CX lets you in, QF would need to pay...I doubt in your case QF would agree to pay CX anything if according to their rules you really need to be on an oneworld flight departing from HKG...

I suggest, if you are in a similar situation next time, go to the QF counter and ask for a lounge invitation, since you are flying with them...if QF gives it to you, great, that means QF agrees to pay and you can get into The Wing just with the invitation, no question at all...otherwise, it's more a problem with QF, and not CX, not willing to pay this little extra even though you are taking an F flight with them that day...