You should use whichever account is most relevant to the action you are using Worktribe for. If you are putting in an application for part of your studies, use your student account. If you are reviewing an application as a supervisor or LREC then you should use your staff account.
If you need to use both accounts, we recommend using a different browser for each account or using private browsing e.g. incognito mode, or InPrivate browsing.