yes, you can insert to multiple tables by adding multiple insert record behavior to the page.
Open the server Behaviors panel (Window -> Server Behaviors), click the plus button and select DataAssist -> Insert -> Single Record Insert.
On the first page of the insert record behavior, Look in the session variable section, make sure the Primary Column for your table is selected in the Key Column and make note of the "Store As" setting. A session variable with the name set in the Store As section will be created when the record is inserted with the ID of new record.
On the second page of the insert behavior, select each column, click the lightning bolt next to value and select the corresponding form element from the dynamic data bindings.
when adding the second insert behavior, you can use the session variable created by the first behavior in the relationship column of the second table.