The Brazilian is widely expected to leave the French capital in a bid to find playing time before the World Cup.
Manchester United have been touted as the most likely club to sign the 25-year-old.
But Nantes president Waldemar Kita has revealed his club have been given the option to sign Moura and he warned the winger that signing for a big club may dampen his chances of regular playing time.
Kita told L'Equipe: "PSG told me 'no problem,' but it is with the player and his agent that things are more complicated.
"They surely have offers from big clubs but, personally, I think it would be nice if he stayed in France because to leave for abroad in January is always difficult.
"In order to convince, we need direct contact. I was appropriate; I contacted decision-makers at PSG first. Again, they told me 'yes, in principle.'
"The problem is that things have been dragging on for two to three months with his agent. Things remain open."