One way to keep track of player turns is to use "states". You can keep track of the state of the game by using a global variable.
If you make a global variable called 'PlayerTurn', you can create sub event conditions like after the dice is rolled, pick the player object that is the same as 'PlayerTurn', move it, then increase 'PlayerTurn' by one. Then the next time you roll the dice, it would move the next player object.
Then add an event to reset the variable back to 1 if it is ever greater than the number of players present, to account for a variable number of players. The total number of players can be set by another variable.