I know that's been tossed around a bit, but I would be really surprised if Murray went for that. He's just exchanging one tough negotiation with another, only he would have to start from scratch with Trouba.
If Lindholm were moved, I feel confident that the return wouldn't require that sort of careful handling. Murray would want to fix his problems, not shift it to another player. Trouba's trade demand, because (at least, based on what I hear? is it wrong?) he wants to play on a certain side is probably not going to endear him to Murray either. Murray is pretty old-fashioned, and I think he'd consider that a character flaw, and an example of Trouba putting himself ahead of the team.
That's also one of my fears with the Lindholm negotiations. I'm worried that the relationship between Lindholm and Murray might sour, and Murray is the type of person who, even after everything is over and done with, he might hold a grudge. If you can't tell, I'm not the biggest fan of Bob Murray right now.
It may just be the relationship between Lemieux and Murray sours, and I don't care too much about that.