Why do you need to to use multiple accounts? The only scenario I can think of to switch account is, if you had an account on beehaw.org and didn’t approve of the defederation. If you’re on lemmy.world this won’t affect you much, except in fringe cases, where beehaw.org users won’t communicate with you when you post there. Alternatively, you can switch to an instance that’s not defederated from beehaw.org to get the benefits of both worlds.
Why do you need to to use multiple accounts? The only scenario I can think of to switch account is, if you had an account on beehaw.org and didn’t approve of the defederation. If you’re on lemmy.world this won’t affect you much, except in fringe cases, where beehaw.org users won’t communicate with you when you post there. Alternatively, you can switch to an instance that’s not defederated from beehaw.org to get the benefits of both worlds.