[NEED HELP] Make Private Download Link on Wordpress Blog

Hello folks, I have a wordpress blog that contains some download stuff. Is it possible to make the visibility of the posts are normal (public) but the download link in those posts are locked and only for members?

All kind of helps will be appreciate.

Thank you,
Irvan

http://wordpress.org/extend/plugins/membership/ and the shame here http://premium.wpmudev.org/project/wordpress-membership-lite/