login

Hi I have an intranet that people login to on our site. There are roughly three different groups of people that login. Each user is labeled as one of those three groups within the mysql table they are stored in.

Is there a way to set up 3 user accounts representing those groups in gallery 2 and then automatically logging them in when they go to the g2 page? I would like to control what albums each group can see.

If so, how?

Thanks!