Filter jetengine grid by the current user’s role

gistfile1.txt

add_filter( 'jet-engine/query-builder/query/items', function( $items, $query ) {

    if ( empty( $items ) || ! is_array( $items ) ) {
        return $items;
    }

    $taxonomy = 'authorizations';
    $user = wp_get_current_user();
    $user_role = $user->roles ? $user->roles[0] : 'guest';

    $filtered = [];

    foreach ( $items as $item ) {

        $post_id = 0;

        if ( is_object( $item ) && property_exists( $item, 'ID' ) ) {
            $post_id = (int) $item->ID;
        } elseif ( is_array( $item ) && isset( $item['ID'] ) ) {
            $post_id = (int) $item['ID'];
        } else {
            $post_id = (int) ( $item->id ?? $item->ID ?? 0 );
        }

        if ( ! $post_id ) {
            continue;
        }

        $terms = wp_get_post_terms( $post_id, $taxonomy, [ 'fields' => 'slugs' ] );

        if ( empty( $terms ) || is_wp_error( $terms ) ) {
            continue;
        }

        if ( in_array( $user_role, $terms, true ) ) {
            $filtered[] = $item;
        }
    }

    return $filtered;

}, 10, 2 );

add_filter( 'jet-engine/listings/allowed-posts', function ( $posts ) {

    if ( empty( $posts ) || ! is_array( $posts ) ) {
        return $posts;
    }

    $taxonomy = 'authorizations';
    $user = wp_get_current_user();
    $user_role = $user->roles ? $user->roles[0] : 'guest';
    $filtered = [];

    foreach ( $posts as $post ) {

        $terms = wp_get_post_terms( $post->ID, $taxonomy, [ 'fields' => 'slugs' ] );

        if ( empty( $terms ) || is_wp_error( $terms ) ) {
            continue;
        }

        if ( in_array( $user_role, $terms, true ) ) {
            $filtered[] = $post;
        }
    }

    return $filtered;

}, 20 );

Create a custom taxonomy (e.g. authorizations)
Add terms inside that taxonomy for each user role you want to authorize.
The slug of each term must match the WordPress user role (e.g. subscriber, contributor, etc.)

Add a check $query->query_id == 101 in the query/items filter.
Add a check $listing->get_id() == 101 in the allowed-posts filter.
for limit snippet to grid with id 101