yes of course he can.
Dear MJ,
Post #26 is about "locus standi" in European law. The cases drummed up by our honourable and learned friend have their roots in competition law. It basically boils down to the fact that representing organisations such as Balpa, N-Flyers, Aopa etc... cannot sue the Commission "on behalf of their members".
But obviously any individual Balpa member or any individual Aopa member or any individual citizen, if affected, can sue the Commission over a violation of Article 15 of the Charter (or any other article of any relevant treaty or rule - discrimination springs to mind too). And if half a dozen citizens sue at the same time on the same grounds, then cases are often merged. It then simply becomes "Bloggs, Jones, The Republic of Ireland, Cirrus Europe Ltd and the Bishop of Durham versus the Commission" or something like that. It'll take them 12-18 months to get to a decision, and it'll cost around € 10,000 in legal fees, but considering that the rest of his career is at stake, I'd say it's worth the time and effort.
So instead of "having a look" at post #26, I would suggest clvdr and yourself actually read it.