Several “add_filter”

This is probably a very simple question for those who know the answer.
I’ve got problems with my plugin: It needs two filters – comment_text and get_comment_ID – but when I try it in this form

function my_filter_function($comment_text, $get_comment_ID) {
...
}
add_filter('comment_text', 'my_filter_function');
add_filter('get_comment_ID', 'my_filter_function');

I get this message:
“Warning: Missing argument 2 for my_filter_function() in /var/…path…/wp-content/plugins/my_plugin.php on line 20“

“line 20” is “function my_filter_function($comment_text, $get_comment_ID) {“
I guess, the second variable (“argument 2”) isn’t delivered.

So: How can I use several filters for one function?