Hi Everyone Is there a way to Prioritize the Tempo tasks?

Have you considered using a Task Report?

forum.appian.com/.../Task_Report_Tutorial.html

If you're looking to set the priority in design, then you can set it in the process model: forum.appian.com/.../Setting_Priority_through_the_Process_Modeler.html
You can also change the priority during execution:
forum.appian.com/.../Setting_Priority_during_Process_Execution.html

You can also raise or lower the priority of a task when it's running using an escalation: forum.appian.com/.../Escalating_a_Task.html

Thanks you for your suggestions. Sure I will be trying these.