In the ToDo List of SmartCloud Activities, there are two sections for ToDos:
1) Tasks Assigned to Me
2) Tasks Created by Me
In the section Tasks Created by Me, there are only two options for sorting tasks:
1) Last Updated
2) Due Date
Using Activities as a light-weight project management tool, it is essential for me to be able to sort assigned tasks by the person to which the tasks are assisgned (this should also fall in line with IBM's person-centric philosophy for the platform).
Grouping by Assigned To would be even better =)