ReutersJamie O'Hara of Wolves and Stoke's Jermaine Pennant have both suggested in recent times that they could declare themselves eligible for the Republic.
But Lawrence, who was Pennant's team-mate at Stoke before joining Portsmouth on a permanent deal in the January transfer window, has countered that, saying the duo - and others - should not think of playing for the nation because they have no chance with England.
"The only thing I know upsets us," Lawrence said, "is when people are trying to juggle between England and Ireland. That's the only issue, really, and it's not just me saying that. It doesn't look good, does it?
"We don't dislike these people, it is just some of the comments they come out with when they are saying they are juggling between Ireland and England – you just don't want it, do you?"
Lawrence, who was born in Nottinghamshire and qualifies to play for the Republic because of his Kerry-born grandfather, has had to make the transition himself, and admits he was nervous to begin with.
"What with the accent and all the rest of it and being born over there?" said Lawrence when asked about his fears of being accepted into the Irish squad. "Yeah, maybe I was nervous if you like when I first came over and I know it is always in the back of people's minds, things like that."
