exclude categories from portfolio

Hello!
I tried to exclude some portfolio categories, because I want to show two different portfolios (“advertisement” and “events”).

I have searched for a long time and tried several things such as cat=-5 in query_posts(), but nothing worked.

Here is the code where I think it must be placed, but I’m not sure
(It’s the template “otw-prtfolio-filterable.php”)

<div class="otw-twentyfour otw-columns">

                    <ul class="otw-portfolio block-grid three-up mobile">
                  <?php $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;  ?>
                  <?php query_posts('post_type=otw-portfolio&posts_per_page=-1&paged='.$paged); ?>
                  <?php if (have_posts()): while (have_posts()) : the_post(); ?>
                      <li data-type="<?php foreach(get_the_terms($post->ID, 'otw-portfolio-category') as $term) echo $term->slug.' ' ?>" data-id="id-<?php echo($post->post_name) ?>">

Has anyone an idea how i could do that?

Thanks in advance!

https://wordpress.org/plugins/otw-portfolio-light/