Go see how the different Kitin are described at http://atys.ryzom.com/projects/puben/wiki/L_Kitins and you'll also see the roles they've received in the Kitin Lair match their lore-functions.
- Kiban = kitin harvester, and in the Lair they're collecting resources in the mines.
- Kipee = kitin worker, so they care for the eggs and the food.
- Kizoar = kitin scavenger, so they're also collecting resources in the mines, but in their case resources includes food (ie homins).
- Kincher = kitin hunter, so naturally they're the ones who go out to capture food (animals).
- Kipesta = kitin scout, so they patrol the outskirts.
- Kipucka = migrant protector, so they guard the eggs.
- Kirosta = kitin soldier, so naturally they sit in their barracks when all's quiet and only move out when an actual threat appears.