Disable Shared Vision while hosting Locally

I just upgraded to have Dynamic lighting.  We run our game locally with a TV in our table.  I the GM control all the tokens.  How can I disable shared vision so that when I select  a player with Dark vision they can see, but when i select the player without Darkvision it will only reveal what they can see.  I was using Foundry but found roll 20 to be easier to use. 

Do you have a Plus subscription, or a Pro/Elite subscription with access to Mod scripts? Are you using a Dummy account? (I'm guessing that yes you are and you're posting from that account named 'Party'.) Is your game a Jumpgate game or a Legacy game? What game are you playing and which character sheet have you selected for the game? Your options will be different depending on the answers to those questions. If you have a Pro/Elite subscription and access to Mod scripts, then it should be possible to automate the adjustment of vision settings. If you are only using a single Dummy account, then it is going to 'see' from all tokens that it controls at the same time, so you'll have to adjust which tokens have vision turned on, or which tokens are on the Token layer in order to adjust what is displayed. (If you have a Pro/Elite subscription, then this is probably the best option, using a Mod script to automate.)  If you don't have a Pro/Elite subscription, manually adjusting vision settings will be a pain.  If each 'player' only controls a single token, then you could use Ctrl-L to see each token's Line of Sight, but there will be a lot of toggling back and forth and it won't hide everything else all the time.  Alternatively, you could use multiple Dummy accounts and toggle those browser windows on whichever device is showing the game locally. (I don't recommend this - it would be very processing intense, but it is an option.)