Hi Paulo,
I dont believe this would be possible as there is no web_url stored for wf tasks as far as I know. There is one for ticket objects such as request, incident, change orders etc., but not for other objects. This would first need to be created on the SDM side, and the column would have to somehow be populated whenever a new task is generated on a ticket, and currently SDM does not have a mechanism to do that.
There maybe some folks out here on the community that have done something like this with a lot of custom code, and they may be willing to share that code with you.
Jon I.