Why is the Moka version of Lilium called this way?

Here is your answer > The MOKA version is a self-cover of the Opening Theme by the female member of MOKA, Kayo Konishi. It was released as one of the songs for her own CD that was released in Nov. 2006. The MOKA version has nothing to do with the anime and was never used in the anime that was originally broadcast in 2004 or 2005.