When you select a particular section (eg. Venturers) you will only see information relevant to that section. By default the site will show information for the section you are registered as.
Note that you will stay in that section view until you either exit the site, or change back by using one of the other section links.
Certain pages or parts of the site may not have section-specific views, but will often have some kind of color-coding or other way to easily distinguish between the sections.