c - Allow some processes to read and write a directory and deny rest of all processes -

i want monitor processes , give permission accessing directory. have processes want give permission access read,write , rest of process deny access directory.

i have appliction in there multiple processess. want these processes can access specific directory. no other processes should able access directory if running root.

selinux can this. give directory , contents distinct file context, allow access file context specific domain, , run single process within domain.