Trees hierarchy with Torque for TurbineUser

[CORNE Jean Michel Ext WANADOO]

Hi dear community,
 
I am using the security service of Turbine (using TDK-2.2). My desire is to entend the 
TurbineUser 
by adding a department foreign key (to department table) and a self reference for a 
manager field.
 
My question is how to I define it in my project-schema.xml in an efficient way ?
The page http://db.apache.org/torque/peers-howto.html speaking about something with my 
needs ?
 
I want then to implement functions like getTeamForManager(TurbineUser), 
getSeniorManagers(TurbineUser), etc.
 
Do I need to create an alias for TurbineUser ? The how to for extended User, is vague 
about this feature ?
 
Thx for your help