In the UI for user management, each user could select the website that piwik should load by default for this user.
Also when integrating #389 user should be able to define this module as a default module to load.
From ticket #441, if user doesn't have view permission, Piwik could iterate through sites until it finds one that the user does have view permissions for. Otherwise, Piwik would display an error.
(In ) * Added General settings page to: enable browser archiving, define today's archive time to live (fixes #1149)