To amplify what CPL Walker said, it is very possible to manage monitoring 4 nets simultaneously. I'll tell you how I do it below.
Shortrange: I set channel 1 as the local/team freq, and then hit the stereo button and put it on my left ear, which matches my CAPSLOCK (on the left side of the keyboard) as the transmission key and is also on the left side of the keyboard. C1 100.1
Shortrange: I set channel 2 as the squad/plt freq and then hit the stereo button and put it on my right ear, I then set it to Alternate, so it'll say A2 100.3. My alternate transmission key is T, so it's to the right-side, so I match my ear to transmission key to avoid transmitting on the incorrect net.
Longrange: If I needed to listen to longrange freqs, you can set a primary channel the same way as you do shortrange, except I would put the LR on both ears, and use CTRL-CAPSLOCK to transmit. If I needed a secondary LR, I would set it to my right ear (again and the only time two separate nets transmit to one ear), knowing that the alternate LR, is for very specific net/comms/reasons and then use a different LR transmit key that is to the right side of the keyboard.
If you do this constantly, eventually, this will become muscle-memory and you won't have to even think about it. You'll know exactly who is talking on what net and how to communicate with them while simultaneously monitoring 4 different nets. Not as easy as it sounds, but it is definitely possible.