If it's a critical process, it will restart.
The process will quit and free up the resources it was taking up. There’s typically a timeout, but it will vary from service.
If it does not then no, I’m not aware of any way to force the other sessions to close. You can even force the Finder to quit, if it stops responding: Select Finder in the Force Quit window, then click Relaunch. (This is similar to pressing Control-Alt-Delete on a PC.) Then select the app in the Force Quit window and click Force Quit. On most email systems that should invalidate any other open sessions, if not instantly, then after the open session times out. Or choose Force Quit from the Apple menu in the upper-left corner of your screen. To do that, click on the process first and then on the X in the Activity Monitor toolbar. First things first: yes, change your password. There is a right way and a wrong way to eject a USB device or memory card on your Mac. When you identify a process that's causing a problem, either because it's hogging lots of CPU cycles or memory, or because it's highlighted in the Activity Monitor as having crashed, you need to kill it. To flip the order, so that processes consuming the least of the resource are at the top, click the arrow next to Memory or CPU above the list of processes. By default, processes are ordered starting with the one that's consuming the most of the resource at the top, so you can quickly see where problems are occurring or likely to occur.
So, clicking on CPU lists tasks in the order of how much CPU capacity they're using. Clicking on any of those tabs organizes processes according to the percentage of the resource they are using. You'll notice there are five tabs across the top of the Activity Monitor window: CPU, Energy, Memory, Disk, and Network. Or open Activity Monitor in one click through iStat Menus app. Alternatively, go to Utilities in the Applications folder and double-click on its icon. When it appears in Spotlight, hit Return to launch it. The easiest way to launch Activity Monitor is to press Command and spacebar to call up Spotlight, then start typing Activity Monitor. The force quit Mac shortcut will instantly close the running app you only have to follow the steps below: Press the Command + Option + Escape key at the same time and the Force Quit window will appear on the screen.
How to kill process using Activity Monitor