Associating user to either customer, vendor or CSR

[mandrake]

Hi,
I am not sure if this message belongs here, but would like to know the general pattern/method to associate a logged in user to either a customer, vendor or CSR. These are three different tables in the database.

I am using role based DAO authentication. My DAO object contains just userid and password. The logged in user could be either a customer, vendor or a CSR. The Customer, Vendor and CSR information stored in separate tables.

How to achieve this? Is there any general pattern for this?

Thanks in advance,
M

[mandrake]

Looks like I didn't explain the problem properly. What I am looking for is a way to identify an authenticated user as a customer, Vendor or a CSR.
Should we store user_type in Users table? Or is there any better way to handle this scenario using Acegi?

All users will be logging into the system using a same url.

Thanks in advance,