SQL & PL/SQL :: Multiple Unique Values In One Column?

I have a problem with some tables in database.

Table has three columns: userid, pname, pvalue.

Userid has unique values, for example: 234, 123, 587, etc.

In the field pname, there is three possible values: MAC, IP, S/N.

So if I go like this:

select pvalue
from table
where pname = 'MAC';

i get the values of MAC.

If I go like this:

select pvalue
from table
where pname = 'IP';

i get the values of IP.How can I join MAC with IP that is matching this MAC? I need an SQL statement for this.