Filter posts/pages by user_role array

Question

You’ve used LIKE comparison method, that means every similar expression will be matched, including exact string and similar string.

If you want to match exact string, you should use = operator.

Example:

global $current_user;

$user_roles = $current_user->roles;
$user_role_query = array();

for ($i=0; $i < sizeof($user_roles); $i++) { 
    $user_role_query[] = array(
        'key'=>'attribution_roles',
        'value' => $user_roles[$i],
        'compare'=>'='
    );
}

I suggest read WP_Query page in WordPress codex for details about comparison methods, relation ways, etc.

Hope it works for you 😉