I was recently looking for the “Allow any user to finish this client event” and couldn’t find it. In 4.5 this has been replaced by a great piece of functionality which lets you configure this from the workspace. Take a look at this screenshot from my unit test process:
My client event has 3 actions, namely Action1, Action2 and Action3 (original, I know). You can now select any action and assign rights to that action. This is great because it means you can tighten down security but still allow for a lot of flexibility. For example, you can give everyone in a group the rights to decline a review (even if they weren’t assigned the task!) but only managers the rights to approve the review (again, even if they weren’t assigned the task).