I'm not sure what you're asking. If you will be traveling to Australia you should be able to get Internet access locally through hotspots or the hotel you will be staying at, providing you'll be in a city at least some of the time. Any Internet connection abroad will allow you to do the same things online that a US-Internet connection will allow. So if you need to access a VPN to tunnel to Texas, or you just want to be able to access Webmail or whatnot, any Internet connection in Australia will do. You do not need to be on the same Internet Service Provider (ISP) that you are when you access from Texas.