U3818DW, switch USB output without switching display inputs?

I have two computers connected to my U3818DW, one via DisplayPort and the other via HDMI. I have USB going out to both of those machines as well. I’m looking for a well (either with the OSD or dell display manager) to switch just the USB output while leaving the display input the same. I have the different display inputs mapped to USB 1 and USB 2, however sometimes I want to leave the display showing one computer and use the keyboard/mouse on the other computer (I have dual monitors). Is this possible?