If you haven't done so already, there's an option on the order guide to cascade variables, so you'll want to be sure that is checked, then create variables with the same names on each of the catalog items so that the data you capture from the requestor appears on each RITM. On the workflow of each catalog item you can add a Run Script activity at the beginning. The workflow is running on the sc_req_item (RITM) table, so to set the short description you would use something like
current.short_description = 'Termination - ' + current.variables.v_user.name;
Where v_user is the Name of the variable. On the Create Task activities, you can leave the Short description field blank, then check the Advanced box and in the Advanced Script put something like
task.short_description = 'Termination - ' + current.variables.v_user.name + ' show them the door.';
Then be sure to select the variables at the bottom that you want to appear on this task.
