If I run
sudo ls; sudo ls in an X terminal emulator, it will prompt for my password twice. If I do the same thing on the native console, it prompts once. I've tried it with xterm and gnome-terminal.
I'm running 11.04.
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.