Hide tickets for non members based on user role. Membership plugins. Ultimate member.

example.php

<?php

add_filter( 'tribe_template_context', function($context, $file, $name, $obj){

    // bail if not the target template
    if ( 'v2/tickets' !== implode("/", $name) ) {
        return $context;
    }

    // This is the name of a category added to members only products in WooCommerce.
    $members_only_product_category = 'members-only';
    // This is the name or id of the required membership level.
    $required_membership_role = 'administrator';

    // Get current user
    $user = wp_get_current_user();

    // Can this user view members only tickets?
    $can_view_member_tickets = ( in_array( $required_membership_role, (array) $user->roles ) ) ? true : false;

    // Check all the tickets
    foreach( $context['tickets'] as $index => $ticket ) {
        if( ! has_term( $members_only_product_category, 'product_cat', $ticket->ID ) ) continue;
        if( ! is_user_logged_in() || ! $can_view_member_tickets ) {

            $on_sale_index = array_search($ticket->ID, array_column($context['tickets_on_sale'], 'ID'));

            unset( $context['tickets'][$index] );
            unset( $context['tickets_on_sale'][$on_sale_index] );
        }
    }

    return $context;

}, 100, 4 );