Tasker: switch on VPN when opening specific URL?
On the Tasker homepage there's a section called &quot;Plans&quot; where the developers outline future ideas that they might incorporate into the product: http://tasker.dinglisch.net/todo.html
Also listed on this page are those two lines:

Actions/Tasks: VPN (dis/re)connect
Events/States: VPN connected

So it's not included yet but it might be at some point in the future. Again citing from the page:

This is an informal list of features under consideration for Tasker.