Hi Manoj,
At the moment, unfortunately, our NetChart does not support orthogonal links and node grouping (grey boxes in your screenshot).
But I am thrilled to reveal that both of those features are already in our roadmap and will be included in future releases of NetChart, so ZoomCharts users will have orthogonal chart out-of-the box. Same as node grouping.
We are working hard to have all the best features in our charts therefore we are thankful for your feature request.
Best regards,
Edgars.