Allow restricted user to change Proxy Settings

I have an OS X 10.4.11 MacBook Pro that has 2 accounts. One local administrator account and one restricted Network mobile account authenticating against an LDAP domain. All users are required to go through a proxy to get out to the internet. The proxy is not accessible outside our network. This means the proxy settings have to be change when the user takes his laptop out of the office. However since the user has a restricted account he does not have permission to change the proxy information.

Is there away I can allow this user to change the proxy settings or even change a Network Location with out giving him administrator privileges.?