Is there a way to use more then one proxy or maybe even rotating proxies?

By "more than one" do you mean a chain of proxies? That'd be rather difficult. Even browsers don't support chains (except when only the first proxy in the chain is visible, and the rest are automagic).

Rotating through a set of proxies should be too difficult. All you need to do is remember which you used last (or, alternatively, which one to use next), then invoke

  $ua->proxy('http', $proxy);
[download]

at the appropriate time (where $ua is an LWP::UserAgent, and $proxy is the URL of the proxy to use).