At the same time?
If you can join them, then yes.
Seperatly, No
To change the source depending on a condition, then yes, using code that
change on the load event of the form, that will change the recordsouce of the
form
If condition then
me.RecordSource = "QueryName"
Else
me.RecordSource = "Query2Name"
End IF
We need to know more about what you need