On my Ubuntu 12.04 box I wanted to be able to capture packets with Wireshark using my standard login. To do this as a standard user simply complete the following steps.
From the terminal
- sudo dpkg-reconfigure wireshark-common
- select yes to the question "Should non-superusers be able to capture packets?"
- sudo adduser $USER wireshark
- logout
Once you login you should be able to capture packets with Wireshark.