is it possible to open multiple PuTTY sessions in a same window ?

use Multi tab PuTTY

• It can open multiple tabs of PuTTY to work on multiple platform in same window
• allows to save login / password apart from hostname so you do not have them manually
• You will get all the saved session on Home page and side menu.

Download link

http://ttyplus.com/multi-tabbed-putty/