It's critical to consider all of your potential customer segments and whether or not your business model involves multiple value propositions for a multisided marketplace.

Consider Google:

Google offers the value proposition of a free search engine to any web or mobile user who wants to search - but they also offer a different value proposition to Advertisers who are a different customer segment that they serve.

If you have different customer segments, you need to create matching elements in every other box of the business model canvas to address it.