Yes, that should work and the number of AIN pins per sensor is minimized. However, sharing pins will add error to the overall conversion as there will be a voltage drop across the R of the RC anti-aliasing filter/EMC filtering which is in series with the resistive sensor, thus limited R values can be used. For optimum EMC/anti-aliasing performance, it is best practice to enable IOUT on a dedicated pin and apply the current to the resistive sensor outside of the AIN input filters. In this case, only leakage current goes through the R value of the external filter so the impact of the R value on overall accuracy is minimized. This implementation uses one extra AIN pin versus the shared implementation.