I second this request! We have several projects and project owners who would find more value in the kanban board if we were able to filter by project owner. I also find that the assignees want a way to filter easily by priority or planned completion/due dates. In addition we are using custom forms to break down the timeline in a task since the tasks are typically assigned to multiple users. If we could create custom filters using these custom form fields that would be a game changer for our team!!