Filter incoming data (Sharepoint Excel file)

Hi all, 

I'm trying to filter my incoming data (Exel file in sharepoint). 

I have a table called NCTS which includes column 'DocumentID' and 'createdBY'. I want to filter the incoming data to only use certain users in the createdBY column. I.E. documents are created by John Doe, Kris and Peter. But I only want to import the rows where the createdBY column has John Doe and Kris in them. 

A solution I thought of would be to filter out the names I don't need in Power Query. But the problem is that I can't select all the names from the CreatedBY column because it updates everyday, but not everyday all the names I need are in the column.

I think I need to have a filter before the data comes in that, checks the column for the names that I have predifined. and then removes all the names I don't want to use. 

I hope this makes any sense because I can't seem to figure out what to do.

Thanks in advance.