Show/hide private content in sidebar for subscribers?

I’m using the “post levels” plugin on my blog to show private entries to subscribed users only.

Along with those entries, I’d also like to be able to show/hide some content pages in my sidebar to subscribers only. For example, I want a “bio” page, but I only want to show it to logged in users who are set at a special access level. This is just a way to keep my main blog content more anonymous so that I won’t be easily identified by people I don’t want reading my blog.

So… is there a way to show/hide site pages in the sidebar? My old blog was on pMachine and I was able to do this easily. I’m hoping I won’t have to give up that capability now that I’m switching to WordPress.

Thanks!