"keep state" and PF Queues

[Brian A. Seklecki]

Would anyone like to elaborate on the impacts of using "keep state" on 
conjunction with pass rules that assign traffic to queues?

One might assume that inverted traffic flows would also be queued, however 
that would break the "traffic can only be queued egress an interface" 
rule...

There should be some remarks on this in pf.conf(5)

TIA,

        ~BAS