This is trully a hard situation.
Personally I think this counts as MC since you actually controls both of the characters.
Regarding the MC rules, you're allowed to pk with one character and level with the other (since you cannot be completly idle anymore) but gaining any advantages in a pk fight with MC is illegal (atleast the last time I checked). Atm this is easy to abuse. You got the same IP on both computers so I could (e.g) MC in a war and say that I use more than one computer.
Truth is that you will never know if I tell the truth or not.
And BOT is fully illegal in real tibia. Just to make things clear Litth Zyrus, they bann players every year for using BOT. You can relate BOT to drugs. Players are addicted to it even though it's illegal and if they get caught, they have to take the consequences.
That's why I think players should be glad that this server allow BOT with an restriction. I think we could atleast obey the rules since they're kind enough to let us use it in leveling and collecting.
And you should know that players been banned for ignoring the rules. One player got banned for 14days so they actually take the rules serious.
My question is, - Why have rules if you're not following them?
Yes, Internet Cafes is an issue when it comes to this. I just find it funny that all the egyptians goes to the same Internet Cafe

- with two computers.
Even though it's hard to know when someone MC (like you mentioned) it's actually quite easy to see when someone MC with BOT.
No, I'm not Superman, but come on... I doubt I need to explain how easy it is. And I doubt I'm the only one since Pindakaas made this thread.
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Anyway, this didnt really say if this is illegal or not. Tbh I dont know. But I will ask Admin / Cm to send an reply here.
Also regarding Pieroozek using two computer) First of all, wow
second thing is, in a war this shouldnt be an real issue. (since he doesnt use bot). I doubt piero~got more than 2 arms and I'm pretty sure he cant play with his feets. If you attack him alone, yes it's annoying, but not in a huge war.