This is a difficult question because there seems to be an inherent contradiction within it. Those who are truly saved are also regenerated, they are new creations, and the old things have passed away (2 Corinthians 5:17). Also, 1 John 2:4 says, “The one who says, ‘I have come to know Him,’ and does not keep His commandments, is a liar, and the truth is not in him.” So if someone really is born again, there will be a change within him, and he will resist sin. Homosexuality is a sin (Rom. 1:26-32).
So, we must ask how someone who's truly saved can also purposely be in rebellion against God? This would not make sense. If someone was a practicing homosexual and did not consider it to be sin and would not receive correction from the Word of God, then it is most probable that the person is not truly saved.
Salvation results in a change in the person, and though we may still war with the same old sins, the fact is that we are at war with them. Our fight against such sins is one of the signs of regeneration. If there is no fight against sins, then it is a sign that someone is not really saved at all.