If you want to check who is using your internet through WIFI. Like if you just want to survey that how many people are currently connected to your network or If you are Providing the internet as sharing you might find this problem that you password is leaked and so many people are using your internet.To See who is using your internet you need to have a software which will tell you who is currently using your internet. And you can Save these details in a Spread sheet as well.Its provide the information of IP address,Computer name and Device name. The software provide the information is shown in the picture given below .
To Download This software Click here.