You can control individual process' audio input parameters using the Master and Application Input screen. You access it by selecting the Application Controls option from the View menu while the Record tab is active. Refer to the following illustration for an example of this.
The controls provided behave exactly the same as those provided for the Master Output, with the exception that they are provided for one process at a time, rather than for an entire output device. Processes that are currently using audio are displayed in the list box at the top of the panel. By selecting a process, you can individually control the gain, and balance of that process. The Monitor volume is controllable only at the master level, so there is no Monitor Volume Slider on the Application Input panel.