There is a way to do it, though I'll say it is much easier to achieve with the standard chart component, but possible with the easy chart.
It is not trivial with the standard chart component, particularly if you've never dug around in the JFree Chart API. Utilizing the Easy chart is possible but you will continually run into road blocks particularly in this case where you want to respond to a check box being selected. You will need to add your own check box components outside of the easy chart, for this to work at all, as you cant change the function of the check boxes included with the component.
This thread goes through a solution to a different issue, but details changing the axis of the chart.