Few from Australia, NZ, or South Africa have had much professional rugby. Lima Sopoaga is the only one from NZ with a full time Super Rugby contract, and has been getting regular starts for the Highlanders (only because Colin Slade has been injured for most of the season though). Sam Cane, Beauden Barrett, TJ Perenara and Gareth Anscombe were included in Super Rugby wider training squads, and both Cane and Barrett and have had a few minutes this season. The rest of the squad haven't played any Super Rugby. That is generally the case with NZ Under 20 teams, with most players only making it into Super Rugby a couple of years after playing in the U20 tournament (I can only think of 7 from last years team that are included in Super Rugby squads this year: Moli, Kerr-Barlow, Blyeendaal, Ngatai, Savea, Veainu, Marshall).
The Australia side have Colby Faingaa, Ed Quirk, Michael Hooper, and Tom Kingston that I know have played a limited amount of Super Rugby (Faingaa has played by for the most of the four), though none are regular starters (you could perhaps argue Faingaa was a semi-regular starter). Liam Gill and Dom Shipperly were initially in the squad but were recalled to the Reds due to a number of injuries.
The only South African players that I know have played Super Rugby are Mjekevu and Taute. Taute was a regular starter for the Lions, and was a late inclusion after Lions finished their Super Rugby campaign (he replaced an injured Barry).