We allowed some of our youth players i.e. Caine Barnes and Josh Woods to play for them against Huddersfield as they were low on players. Those two are cup tied now so can only play for Swinton and I doubt we would stop them playing for Swinton against us if they need them, the same would apply to any others that played for them in round 4 if any did. If we were to let them use others I would only expect us to allow them to use players that are so far from the first team for us that we are unlikely to need them in the cup ourselves. (Assuming of course that we don't suffer the same fate as Huddersfield).