Dynamic Webconfig?

[Glitterati]

Is it possible to create a webconfig file dynamically? We have a web app that presents a series of menus. We would like those menus to be populated based on username or user group. We can get all this information from a table and it seems easy enough that we coulduse the information in the table to populate the webconfig file, but never having done it before, I don't know if it's possible. Is it?

Thanks in advance!