From the administration interface, you have the possibility to create and organize your projects.
Click on the leaf "Projects" in the left Tree to display all created projects.
"Project Category" and "Priority" columns are editable so you can ordering projects as you want.
Projects which have the same category will be grouped together and displayed in the same panel. If a project has not category, it will be automatically placed in a "Public" category.
Priority manage in which order projects will be displayed (left to right).
Assuming you want to regroup two projects which treat the same topic :
The result will look like something like this :