filter an importrange

=FILTER(
  IMPORTRANGE(“SpreadsheetURL”,”SheetName!A:C”),
  INDEX(IMPORTRANGE(“SpreadsheetURL”,”SheetName!A:C”),0,3)=”SomeText”
)

Note:
- The last parameter of index denotes what column number to filter the array by.
In the above example, we are filtering the array by Column 3 and returning
results that match SomeText in Column 3.