Real-time user logins monitoring tool - whowatch

Whowatch is an interactive ncurses who-like utility that displays information about the users currently logged on to the machine, in real-time. Besides standard informations (login name, tty, host, user's process), the type of the connection (ie. telnet or ssh) is shown. Display of users command line can be switch to tty idle time. Certain user can be selected and his processes tree may be viewed as well as tree of all system processes. Tree may be displayed with additional column that shows owner of each process. In the process tree mode SIGINT and SIGKILL signals can be sent to the selected process. Killing processes is just as simple and fun as deleting lines on the screen.

Whowatch has no command line options or configuration file.

Whowatch Installation:
Open terminal from Applications > Accessories > Terminal, and type following command to install

sudo apt-get install whowatch

Using whowatch:
From command line, type command 'whowatch' and you should see something like ..

If you press ENTER while on a any username (on display) you will see the info about the process that particular user is running.