Yes it's totally possible to do this via the clone symbol which you can find in your presentation card.
Afterwards, you just need to choose the account where you'd like to copy your presentation and it will be done in few seconds.
"I'd like to copy my presentation in another user's account"
You also have a clone symbol in the viewer of your presentation. This allows your audience to copy your presentation in their Ludus account.
If you're a Pro user, this isn't automatically activated. You just need to activate this in the settings of the presentation viewer located in the upper right corner of your editor. You can anytime customize your viewer by ticking the boxes you want.