The filter property can also be a function. This allows to completely customize the filtering logic.
The function passes a single argument – each Scheduler event that will be displayed.
The function should return true ( if the condition is met ) or false ( if not ).

Here is an example: https://codepen.io/svetoslavjqwidgets/pen/LYJmGLr

Best Regards,
Svetoslav Borislavov

Smart UI Team