Hi Basara,
yes you can post the URLs on the comment sections of your orders but so as for the customer to actually see it, he will have to copy-paste the URL on his browser and then click enter.
Instead you could give something like an "insert-link" attribute which would allow the customer to only click on it and the respective URL opens up automatically.
By the way here is another suggestion (I also changed the topic's title accordingly):
Is it possible to allow some people to become something like moderators for your online shop?
Why I am saying this:
As you are the super admin you want full control over everything, to be able to observe the stats etc.
But when your online shop becomes successful you want to add people to do stuff that usually the super admin would do like: responding to customers, changing prices on products etc.
Nevertheless, there are things that as a super admin you do NOT want the moderators to see like: the money you make, your shop's stats and so forth.
In other terms, you want people to be able to take care of the basic time consuming things while, at the same time, you do not want them to be able to know your income or doing things that could mess up your store like: deleting products and so forth.
Obviously, this involves a lot of programming no doubt about it.
But since I love Abantecart - this is why I am making this proposition.
Think about it like this: that at some point, if an online store is that successful and is to go international, more people will have to be involved in managing the online store - thus, such an option (aka, mods) will have to become available eventually.