You can only win one CasinoMagic Jackpot at a time.
However, it is possible to win several CasinoMagic Jackpots during the same day. Therefore, you could win the Time Casino Jackpot, Must Casino Jackpot and Big Casino Jackpot all in the same day.
You can also win a CasinoMagic Jackpot at the same time as a specific jackpot in a game. This is because the CasinoMagic Jackpots are completely independent of other jackpots.