Sorry for the late reply.
I need some answers so I have a clear picture of what you want to accomplish.
You have a Task list (let;'s call it BigTasks), you display the tasks from BigTasks in a qListView and when you select a task here (let's say TaskA) the task is opened in a different page on a qListForm web part.
You solved that part.
Now comes the part that I don't get well. We have the TaskA displayed in a qListForm and on the same page you want to add a qListView that would display all items related to the TaskA. Is that correct? How those tasks get related to TaskA? There is any field that is commom to TaskA and the other tasks you want to see?
I picture this as following. BigTasks list has a field called Sport (Hockey, Soccer, Basket) and TaskA is about Hockey and you want to display all tasks that are related to Hockey from the same list. Is this correct?
As soon as you know I'll try to help.