[Lxc-users] how to use system container

[allen]

HI ALL:
    My aim is to run a Graphical application in a container, then an
user connect to the container with a GUI interface, so that he can see
and operate the application.
    As I want to separate all resources, I think I'll need a system
container. Now I already use "lxc-create -n maverick-lxc-template -t
maverick -f /tmp/maverick-template-network.conf" to create an Ubuntu
template, start it and use lxc-console to get a console of it.
    Now my question is:
    1. If I want to run an application, do I have to install it in the
system container first?
    2. How can I connect to the container with a GUI interface?

    I'm new here and don't know if my problem is appropriate.
    Thanks in advance for your help!
allen