您可以添加一个低优先级的身份验证挂钩，该挂钩在所有其他挂钩之后运行，并拒绝特定用户ID的身份验证：

function wpse_384212_ban_user_id( $user, $username, $password ) {
    // At this point $user is either a WP_User object if they\'ve successfully logged in,
    // or null or a WP_Error if they haven\'t. We want to reject users by ID.

    if ( $user instanceof WP_User ) {
        // This is a successfully authenticated user. Check their ID.
        $banned_user_ids = array( 3, 6, 10 ); // could also store these in a site option

        if ( in_array( $user->ID, $banned_user_ids ) ) {
            return new WP_Error( \'user_banned\', \'You are banned\' );
        }
    }

    // Else return the user or error from previous authentication filters
    return $user;
}

add_filter( \'authenticate\', \'wpse_384212_ban_user_id\', 999, 3 );

这将拒绝以其他方式成功登录的用户。如果您想拒绝他们，无论他们是否成功登录，您需要查找用户以获取他们的ID以进行额外检查：

function wpse_384212_ban_user_id( $user, $username, $password ) {
    // At this point $user is either a WP_User object if they\'ve successfully logged in,
    // or null or a WP_Error if they haven\'t. We want to reject users by ID.
    $banned_user_ids = array( 3, 6, 10 ); // could also store these in a site option

    if ( $user instanceof WP_User ) {
        // This is a successfully authenticated user. Check their ID.

        if ( in_array( $user->ID, $banned_user_ids ) ) {
            return new WP_Error( \'user_banned\', \'You are banned\' );
        }
    } elseif ($username) {
        // Unsuccessful login but we have a username.
        // Look up the user by username or email to see if they are a banned user
        $login_user = get_user_by( \'login\', $username );
        if ( ! $login_user && is_email( $username ) ) {
            $login_user = get_user_by( \'email\', $username );
        }
        if ( $login_user instanceof WP_User ) {
            // This was a failed login for a valid user. Check the user\'s ID            
            if ( in_array( $login_user->ID, $banned_user_ids ) ) {
                return new WP_Error( \'user_banned\', \'You are banned\' );
            }
        }
    }

    // Else return the user or error from previous authentication filters
    return $user;
}

add_filter( \'authenticate\', \'wpse_384212_ban_user_id\', 999, 3 );

如果这是一个多站点，那么这些将需要一个mu插件。