You can in some circumstances, but the costs are considerable. NBN has a service it calls “Technology Choices” that allows you to pay for the full cost of rolling the fibre to your premises as long as you’re in a fixed line NBN location, but only on a single premises basis. Typical costings can run north of $10,000 or much more to do so. If you’re still keen, you can put in a quote application at the NBN Co Technology Choice portal