Waterdeep: Dragon Heist has multiple factions which PCs can belong to, or join. These include Lord's Alliance, Emerald Enclave, Bregan D'aerthe, etc. If a PC matches the requisites for more than one of these factions, can he join multiple ones?
For example, could a drow druid join both Emerald Enclave and Bregan D'aerthe? Or is membership exclusive, and PCs have to pick a single faction to work with?
Yesterday, I told my players that they could belong to multiple factions as long as their missions and actions didn't cross each other. But it was a DM's call in the moment, and I wanted to confirm my ruling.