Leer Christopher App analyst

In our previous 6.X version of docuware we were able to capture an AD name in an index field then assign it to a text global variable to be used to assign a task to that user. Today I was creating a workflow for the first time utilizing this procedure since upgrading to 7.0 but a text global variable doesnt appear in the select select under variable in the assign to activity. How can I still accomplish this as sometimes our workflows are very fluid in who needs to approve it and how many approvals, so utilizing groups or roles wouldnt work very well.