Google-analytics – Custom alert for unexpected sources – Google Analytics

I think I've found the answer:

http://www.google.com/support/analytics/bin/answer.py?hl=en&answer=72273

You cheat by adding another user (the one at @my-own-domain.com) to Google Analytics, giving him administrative rights and then revoking those rights from another user (the one at @gmail.com).

Or maybe there is another way?

Here's also a similar discussion:

Transfer ownership of Google Analytics accounts?

Unless you use custom variables, this is not possible, since Advanced Segments are visit based and not visitor based. Custom variables can however be set to be visitor specific.

E.g. you set custom var 1 to visitor level on the specified page according to Google's instructions (please use async code), examples here: http://code.google.com/apis/analytics/docs/tracking/gaTrackingCustomVariables.html

Actual code sample (added to the page code, before "_trackPageview"):

...

 _gaq.push(['_setCustomVar',
      1,                   // This custom var is set to slot #1.  Required parameter.
      'Returning purchasing visitor',     // The name acts as a kind of category for the user activity. Required parameter.
      'Yes',               // This value of the custom variable.  Required parameter.
      1                    // Sets the scope to visitor-level.  Optional parameter.
   ]);

...