Automations created in Hue Essentials can be started from the Tasker app. (Tasker is a third party app and Hue Essentials is not affiliated with Tasker in any way).
First you need to create an automation with an External event and save it. Configure the conditions and actions however you want. See for more information: Automation that can be triggered externally
Now create a task in Tasker. As task action you can start the automation you created earlier. For more information how to create a Tasker task see: How do I use Tasker?