Whether it's the same or not, it's another point of connection.
Watching the film now...
With her sitting by a destroyed At-AT (reminiscent of Luke's battle on Hoth), wearing a rebel pilot's helmet very similar to one worn by Luke, dreaming of escaping her dreary existence on a desert planet, the clues are seeming to point very clearly to her being his daughter. Or it's simply an allusion to Luke's life - yet the Force is strong in her, and Luke does state, "The Force is strong in my family. My father has it. I have it. My sister has it. You have that power, too."
She has to be be. Doesn't she?
"Family" and "you" in the same sentence.
While he could mean Leia, I feel the implication is that he means himself. Father, sister, daughter?