You probably are not going to find a specific category of government grants targeting a single mom. However, Australia has grants to help women small business owners as well as small business owners in general that may apply. If one is looking for mother government grants under the small business funding for a specific category such as this one, she would have to research all of the available loans and grants.
You can also take advantage of the Small Business Startup Assessment Tool below and see the tools and resources you need to succeed at launching your business. It takes just a minute and will also tell you if there may be any funding programs available.