Ok, as promised... Here is an express solution for PhpBB script (I think I could fix the other ones, but I'm using PhpBB only). So let's begin...
1) go to your main forum directory (say bla-bla-bla.com/board) and look for
memberlist.php.
2) open it (memberlist.php) with a text editor when search for the following lines:
$www_img = ( $row['user_website'] ) ? '<a href="' . $row['user_website'] . '" target="_userwww"><img src="' . $images['icon_www'] . '" alt="' . $lang['Visit_website'] . '" title="' . $lang['Visit_website'] . '" border="0" /></a>' : '';
$www = ( $row['user_website'] ) ? '<a href="' . $row['user_website'] . '" target="_userwww">' . $lang['Visit_website'] . '</a>' : '';
now just replace them (I mean the lines above) with the following code:
if ($posts > 1) {
$www_img = ( $row['user_website'] ) ? '<a href="' . $row['user_website'] . '" target="_userwww"><img src="' . $images['icon_www'] . '" alt="' . $lang['Visit_website'] . '" title="' . $lang['Visit_website'] . '" border="0" /></a>' : '';
$www = ( $row['user_website'] ) ? '<a href="' . $row['user_website'] . '" target="_userwww">' . $lang['Visit_website'] . '</a>' : '';
} else {
$www_img = ' ';
$www = ' ';
}
3) now just upload the modified
memberlist.php file into your main forum's directory
That's it guys! Now URL's will be shown for those members only, who have posted at least 1 (one!) message to your board. Course you may change the required number of posts as you want. Just put an appropriate value to this line:
if ($posts > 1) {
e.g.:
if ($posts > 10) { // means: make at least 10 posts to see your URL in the members list! ;)
Hope it will be useful for somebody

At least it works great on my own board
