You can achieve it by adding two submit buttons (Hold and Release), each bind to a different yes/no column in your SharePoint list. Once the button is clicked it has to set the value of a related field to Yes. 

 Then you need to create a state machine, so that your workflow will go into a different state based on the clicked button. So if user clicks "Hold" then it should go to a related state where the workflow should pause and wait for the second yes/no field to be equal Yes (so that a user clicked "Release").

 It you would like to achieve it only using tasks, not actions in the form, then this is also achievable but needs different approach (like a different outcome etc...)

I would recommend the first approach.

 Regards,

 Tomasz

Thank you for your feedback Tomasz, I ended up getting it to work using tasks and adding an "On Hold" outcome.
Once selected the state would be changed to pending.  Once the user is ready to resume, he can open his workflow task item and select approve or reject.

Ok, so you are just reassigning a task. If that works for you I'm glad I could have helped you

Please mark yours or mine answer as correct if you feel your question has been answered.

Regards,

Tomasz

For sure.  I am pretty new to the board.  How do I mark a post as answered?  I don't see the action.  I just see branch and report abuse in the Actions menu.  For the actions on the lower right, I just see helpful, like and reply actions.

Simply click the "Mark correct" button on the right of the chosen answer:

Regards,

Tomasz