If you make a fresh install, update and upgrade your Lubuntu 14.04 LTS to the current state and reboot, it should work to add the word nm-applet to the file $HOME/.config/lxsession/Lubuntu/autostart which can be done with the following command line.
If you have two applet icons, it may be left from a bug, that appeared during the development of Trusty (at the alpha or beta stage). If you get the 'wrong' meny from the applet, it may also be something that remains from an earlier stage. Did you make a fresh install of Lubuntu when released or during the alpha or beta stage, or did you upgrade from Lubuntu 13.10?
echo 'nm-applet' >> $HOME/.config/lxsession/Lubuntu/autostart
I was working with this issue during this weekend, and it should work, at least with the built-in free drivers for wifi and wired internet.
See this link https://help.ubuntu.com/community/OB....04_OEM-nonPAE where I made a tarball for the One Button Installer that fixes the nm-applet almost automatically for the released version of Lubuntu 14.04 LTS.
I do not mean that you should do all the things described there, I only show what was done to tweak that particular system. In a fresh install it should work to activate nm-applet. You can run it 'now' by
but then it will not start automatically after rebooting. I have seen people report that it works better for them to run nm-applet with superuser privileges, but it destroys the possibility to run it plainly without superuser privileges afterwards. I think some file is created somewhere, and I have not identified it. See also this link