What's the Operator to be used in BPM Approval Rules to exclude set of people (50) for Expense

Summary:

In Expense Report Approval Rules configured, Single Block is having multiple rules in our case.

Question 1:

I used 'IN' operator to include people in the approval rule but I am not sure which operator to be used to exclude people (say 50) from few approval rules. 

I am not seeing 'NOT IN' operator in the BPM approval rules. 'Isn't' Operator is only allowing one person at a time not the list of people.

Question 2:

Is there a spread sheet upload option available for Expense Approvals like Journals / Invoice rules?

Version (include the version you are using, if applicable): 24 C