I need to find the password for my wifi network into which I'm already connected to. I'm using MacBook Pro with OSX Lion. Any guidance please.
If the password is stored, you can find it using the program Keychain Access.
If you open
Double-click the name of the network you are using (if you don't know the name of the network, you can find it in the WiFi menulet (the concentric quarter circles toward the right side of your menu bar).
Check the Show password box, enter your system password, and click the Allow button.
That should show you the password for the wireless network you are on, if it is stored on your computer. If no such entry appears, it means the password is not stored on your computer.
Note that you can also use this technique to find saved passwords for websites or other passwords that you computer has stored but you have forgotten.
Spotlight → Keychain Access → type Wi-Fi name →