Discovered that you can set a custom variable in Google Analytics to the ID of the Sharepoint user (that’s ID, not Name) :

This is the tracking code I used. The important part here is the _gaq.push([‘_setCustomVar’ line. We can use the Sharepoint JS variable _spUserId:

Don’t forget to change the UA string from

UA-xxxxxxxx-x

to the value for your site!

 Lovely!