The problem child of problem children. This thing seems like the red-headed step-child of a red-headed step-child, to put it mildly... Seti@Home.
From your table:
Project - Seti@Home
User ID - No
Username - Any (including special characters)
Name Change - Yes
Team ID - Alpha-Numeric
Teamname - Any (as with username, including special characters)
User Movement - Yes
WU Portability - Yes