basic authentication query

i have one customer who want to know about the following below query...

1) basic authentication users for limited and full access internet in proxy profiles- where can i create this for users static membership with basic authentication and standard mode.

2)one static users should work only one concurrent connection to get user base report for bandwidth and time usage.

3)we have 4 vlans totally isolated with each other then how to give web access using proxy profiles for the vlan network with basic authentication user per user.

4)can we make exceptions for one basic authentication users for full access.

tried knowledge base but no information found so far...