"I've had a bit of a chat to him and he says he wants to play for us, so I'm hoping he does and hopefully one day he gets his chance.
"At the end of the day, it's up to him. It's his choice."
Barba also shared with Kasiano his experience as Queensland's 19th man and the tight-knit camp in the lead-up to game two in Sydney.
"Hopefully that gets through to him and he makes that choice," he said.
Barba, who is also chasing a Maroons jersey as a replacement for injured fullback Billy Slater, is confident in Kasiano's ability to step up to Origin level.
"For a big fella he carries himself pretty well," he said.
"He's got that effort and effort that you want to see in a big front-rower - especially as big as Sam."
Bulldogs coach Des Hasler said he didn't know if Kasiano would play for Queensland but joked that he was definitely "big enough" to do so.
"I'm sure if he gets that opportunity he'll relish it," Hasler said.
"For young blokes (Kasiano and Barba), they've got their feet pretty well-grounded so they won't get too carried away with it."
Despite being a New South Welshman, Bulldogs forward Aiden Tolman said it would be good for the game if players like Kasiano are allowed to compete in Origin.
"(New Zealand-born) James Tamou's playing for NSW, so it's the same situation as that," he said.
"At the moment, guys like (Tamou and Kasiano are) eligible for it so it's good for the game and probably improves NSW as well as Queensland.
"He's been playing great for us and I'm sure he'll put his hand up if the opportunity came about."
Both Kasiano and Barba will get to prove their worth in Sunday's top-of-the-table clash against Melbourne in Mackay.
It's the first time the North Queensland town has held an NRL fixture, with all 12,000 tickets already sold.