IM app that requires password

[Teacher's Pet]

I need an instant messaging app that requires a password. I would really like if it was universal but it definitely needs to have an iPhone counterpart.

All of the apps that I have save the log in information unless you delete all data from the app.

I was looking for an IM app that can be set to ask for a password every time you manually log out then log back in.

 

[Teacher's Pet]

How about an iPhone app? And not worry about the iPad counterpart. Meebo has a clear data button. Anyone know of a good messaging app with a similar function?