if (is_user_logged_in()) {
if (have_rows('repeater-field-name')) {
$user_id = get_current_user_id();
while (have_rows('repeater-field-name')) {
the_row();
if (get_sub_field('user_id') != $user_id) {
// skip
continue;
} // end if not for current user
// display row content here
} // end while have rows
} // end if have rows
} // end if user logged in
