There is no way to get this information with any of the built-in reporting or graphing tools that come with QC/ALM. This infromation is stored in the qc_siteadmindb database and none the the built-in reports can access it.
The information that you are looking for is stored in the qc_siteadmindb --> SESSIONS_HISTORY table on the database server.
This table holds information on...
The user name
When the user loggin
When the user logged out
The project and the domain they logged into
The type of client used (ex Client UI or Excel Add-in)
If you are using MS SQL you can query the entire table and export it to Excel where you filter the information