He was named as such by John Hemming MP in parliament this afternoon. John Hemming later justified his actions because he was concerned that tracking down lots of people from Twitter and jailing them would be wrong particularly as many of them would not have the means to defend themselves.
My understanding is that Ryan Giggs took out the injunction because he was concerned about the affect on his family and in particular his children. Whilst this is an admirable aim, were he that concerned he need not have had an affair in the first place. Even if you are wealthy things things do eventually come out.
On a wider note there is something odd about super injunctions, particularly those concerning corporate bodies such as Trafigura. Whilst they are legal individuals they are not real individuals within the scope of section 8 of the human rights convention and are not entitled to a private family life.