Muso is the perfect platform for you if you have multiple acts. If you have multiple acts, start by signing up with your main act to begin with. From there, you can easily add new acts under the same account by clicking the artist orb in the bottom left of your web page (then click 'Add Artist Profile') OR by clicking the 'More Menu', 'Artist Profile' then clicking 'Add Artist Profile' if you're on the app.
From there, you may easily switch accounts by clicking the 'More Menu', then clicking the relevant profile you wish to toggle to. You may also switch profiles on mobile by clicking the title of the page at the top of screen, e.g. 'Gig Feed'.
Check out this tutorial here on how to manage/switch between multiple acts.