It doesn't work the same at DLR as it does at WDW.
At WDW, you get all the photos that are linked to accounts you're linked to. So, for example, I had bought PhotoPass at WDW for a race weekend and my friend got photos taken with her mom after I went home. My PhotoPass was still active so I had access to download all of her photos.
At DLR, it is only the account with the active PhotoPass that will have the watermarks removed and be able to download the photos.
The only way to "share" at DLR is to link all the photos that a group wants to have to a single account.