Multiple bullets on same line

No offense intended :-) but it isn't "super simple" because it is 'super unorthodox' -- i.e., contradictory to the intended purpose of a Bulleted/Numbered List. Although you can get the visual effect by doing as Rich suggested you're actually creating separate Bulleted lists.

Another approach is to not use the Bullet formatting feature at all. Instead, use Option+8 to insert a Bullet character [•] anywhere you want to have one. You also can use the Symbols palette in the Media Browser or the OS X Character Viewer to insert any character if you don't know its keyboard equivalent.

The purpose of Bulleting is to have all items of equal import listed as individual items in separate paragraphs. Items subordinate to another item also occupy separate paragraphs but demoted to a lower level in the hierarchy. Bullets are used instead of Numbers to indicate that there is no priority or preferred sequence associated with items of the same level... Essentially, an outline using Bullet characters rather than numbers.

You would format each line as a table row with two cells. In each cell you place the bulleted paragraph.

The reason for doing it this way is because a bullet is tied to a paragraph of text and you can't have two paragraphs occupying the same line... except if you separate the areas on the page that accept text and table cells are one way to  do this.