Might be an idea to just have another read of that post, I think you might have mis-read some of the key parts of the message that it was giving out.
Unfortuatly it's Impossible to ban individual people from IRC servers as that information is not given by the IRC Client or the connection.
It's only possible to ban things like nicknames, usernames, hostnames and the 50 characters that make up the "real name" field (Which is never really used for its intended purpose).
Which ever network you have been banned from must have a reason for the ban, making it such a wide ban is their choice.
Really you will be far better contacting the administrators of the network in question as they are the only people that can remove the ban.