In order to keep track of each user's work assigned to a task, all the annotations of this user related to this task should be linked to the task id.
Therefore, when a user creates an annotation, the task id should be provided as below:
curl -X POST \-H "Authorization: Key YOUR_API_KEY" \-H "Content-Type: application/json" \-d '{"annotations": [{"input_id": "{{asset_id}}","data": {"concepts": [{"id": "tree","value": 1},{"id": "water","value": 0}]},"annotation_info": {"task_id": "{{task_id}}"}}]}'\https://api.clarifai.com/v2/annotations