Yes i think community vlan and pacl will be the best solution thank you guys really appreciate it

Seems like a soln .. thank you very much for your help really appreciate it

True you are right , it was a bizarre scenario i encountred that we have a TACACS server on isolated vlan and another server which need credentials and they both have to be on the same subnet that's why i was asking if its possible

Yes i understand but can we use routing or the promiscuous port to pass information between secondary vlans?

By associating the secondary vlans to the SVI of the primary vlan