You can make SuperLab wait for two responses by specifying two events that look for input from participant. I don’t think that it’s possible to do something like accepting up to 4 responses but stop after two correct ones.
Yes, it is possible to have SuperLab record the location of the response. You can obtain pixel coordinates or an area location that you define, or both. Click on the Experiment menu and choose Participant Input. A dialog appears. Enable the chechbox for “Mouse or Touch Screen”. This step will have SuperLab record the X and Y pixel position of the mouse click.
But you can also create responses, which in this case consist of areas on the screen. You can give your response a name, e.g. “upper left”, or whatever is appropriate for your experiment, and SuperLab will save “upper left” to the data file if the participant’s mouse click falls inside that area.