list_name = ['Alice', 'Bob', 'Oscar', 'Alice', 'Alice', 'Bob', 'Oscar', 'Bob']
list_money = [100,200,150,50,80,120,30,180]
dic = dict()
for i, name in enumerate(list_name):
    if name not in dic:
        dic.update({name: [list_money[i]]})
    else:
        dic[name].append(list_money[i])
print(dic)