This table is renderred through "com.ptc.windchill.principal.org.mvc.builders.OrgCreatorsTableBuilder" class.
Ideally one should extend this class, override buildComponentConfig and include column whatever want. Sometime we may also need to write our own data utility for the information you want to display there.
However in this case, the above mentioned class is itself neither supported nor extendible for customization.
I hope this gives you some idea on to proceed further.
