Where

Here you specify where values.
The fields you enter here are used to build
the internal method named runSQL

Select source table

If the list for next field (source field) is
not ready, then click Add/Update

Then select source field

And check or not OR field

Then select Cond to specify what kind of condition

And, finally, fill Expression field with your condition

You can't use the same field for two contitions!
(I think so. I'm not too sure!)