If you have ever wondered how to find which users are assigned to a security task, follow the steps below.
1) Go to Tools>>Setup>>System>>Security Task and find the task that has the security operation.
2) Mark the Display Selected Items to only see the operations for this task
3) Select the operation that you would like to find which users are assigned
4) Click the Print Operation Access button to print a report of users and companies where the operation is assigned