How to Filter multiple departments in Gantt Chart

I am using the following gantt chart version
dhtmlxGantt v.4.1.19, licensed version.

Question: Need to filter multiple departments from gantt chart and table.

Currently, I am able to filter only one department at a time but I need to filter multiple departments with checkboxes in dropdown.

Hello Vittal,
Please, don’t post same questions in different topics. Let’s continue our discussion there:

any update on this. Please share me how to implement

Hello Vittal,
There is a discussion with all the details in the following topic:

Please, add your response there.