We are going to release version 5.3 of MindFusion.Scheduling for WinForms soon. The new version adds the ability to group by two resource types simultaneously in Resource view (for example, you can group by contacts and by tasks). A beta version containing the new functionality can be downloaded from the following link:

https://mindfusion.eu/_beta/MindFusion.Scheduling.WinForms.5.3.trial.beta.zip

To enable dual grouping, use the regular Calendar.GroupType property to specify the first resource type, and the new Calendar.SecondaryGroupType to specify the second resource type.

As usually, comments and suggestions are welcome.

Enjoy!