By page do you mean Page (as in Write > Page), or just a general WordPress page?
You could use the is_page() conditional tag with a parameter of the Page’s ID (is_page(10)) to test for it. is_single() works the same way, if you need this for a post. In an if/else statement you could then either alternate what is to be displayed on your sidebar, or include a different file for your sidebar.
A page you make (Write > page) I haven’t got the pages in my sidebar but in a nav on top of the page. So I make pages and add them manually to the navigation. So I make pages and decide wheter I’m going to add them as a menu link or else.
this is the site: http://rjfalcon.com/wowclan
I want to make in the section “members” different links to pages of the members in the sidebar.
Or if that isn’t possible I want to make several posts in a page. so the post doesn’t shows on the index page but on the members page.
Hope you can help me…