Jesus called Simon "a ROCK" not peter(Cephas)(a first name) like "Rockie".. A ROCK for the building of a metaphorical building(church)..
All members can bind and loose in their own lives.. For wherever two or three meet in my name(there am I) is the church.. If you, do or not do, something you are responsible.. Only the blood sacrifice of Jesus can adjust that deed(s).. What deeds you DO is bound to YOU in BOTH realms.. And what blessings you GET are LOOSED to YOU in BOTH realms.. What you bind or loose yourself effects your life instantly whether by word or deed...
Example: whatever "we" post on this thread binds or looses activity and responsibility on earth and in heaven.. NOW.... Scary stuff without the Holy Spirit to guide you.. and Jesus blood to "cover you"...