Selecting Random Record for each User returned in the results

I have seen several ways of selecting random records from a table using several methods. However, my need I am sure is here, I just cannot find it. I have a query using several tables. What my end goal is is to have one random record for each user returned.

In my result set, I get users and the work items they have. What I need is to only return one random work item per user. This is where I am getting stuck. ANy assistance would be greatly appreciated.