Multiple channels & private messages

I’d like to create multiple channels for different groups of users – similar to how slack channels work. Currently, I’m just doing this by creating multiple instances of wisechat with different channel names in the shortcode – then toggling between them.

However, if I send a private message to a user in channel 1, that’s not reflected if I view my private messages with that same user in channel 2 – it creates two instances of the private message – each tied to the channel.

I’d like these private messages to be global so users can belong to any combination of channels, but always access their specific direct message history with each user. Is this possible?

Ideally, the user would see a list of channels they have access to above the user list (again, like Slack), and the user list would only display the users in those channels.