I am not IT professional but I assume you are running Internet Cafe and you want to control the bandwidth for people who shared your internet connection by monthly payment. As you already made a deal for this, I think you shouldn't control. It doesn't look professional. That's my opinion only. If you are not planning for this. I do apologize.
DHCP ချထားတဲ့ IP Range တစ်ခုကို Bandwidth Limit လုပ်ချင်လို့ အဆင်ပြေမလားမသိဘူးနော်.... ISA Server မှာ Traffic Quota နဲ့သုံးတာက ကွန်ပျူတာတစ်လုံးချင်းကိုလိုက်ထည့်နေရလို့အဆင်မပြေဘူး.. ပြောပြပေးပါဦး.