Hi Tammy,
In that situation I might keep asking IT to tell me who has a file locked in the hope that they might eventually decide to delegate access so I can find out for myself 😉
Something else that comes to mind is to use SAS library access logging to give you an idea of who has been accessing the table most recently. Gerry Nelson wrote a blog post about it: Auditing data access: who did what and when? There's some more info in the Audit Messages for SAS Library Access section of the SAS 9.4 Logging: Configuration and Programming Reference.
Once you have the logging enabled you would write a stored process to report on recent table access.
Cheers
Paul