You can shoot it and eat it, or if you are more peaceable than that, you can throw your edible trash at the edge of your property so that the possum can get it without raiding your trash can. The possum is an animal which follows its God-given programming, and it goes where the food is.
What is under your porch that is so appealing to the possums? I suggest you remove the 'tempation' and make sure they have no access to food and water and enclose the porch.
possums
Possums are not blind.
Possums are eaten by snakes.
There are no possums in possum pie, as true possums are found in Australia and nearby islands, and they are protected in Australia. Possums are not the same as opossums.
Possums are mammals, and are covered with hair.
No. Sugar is not poisonous to possums.
No. Ring-tail possums are not even close to being endangered.
Possums are not eaten in modern times. In the past, the early settlers ate possums if nothing else was available. Certainly the Australian Aborigines ate possums.
In their natural state, Australian possums are external dwellers. However, brushtail possums and ringtail possums often shelter in the roof space of suburban houses.
There is no particular name for a female possum.
The predators of true possums, which live in Australia, are eagles, hawks, owls and quolls. Foxes, which have been introduced to Australia, are also predators of possums. Possums should not be confused with opossums, which live in North America, and are not related to possums.