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There are filters for both ip address (ip.addr) and tcp port (tcp.port) that will filter both "directions" for the respective protocols, e.g.

ip.addr == 1.2.3.4 is equivalent to (ip.src == 1.2.3.4 || ip.dst == 1.2.3.4)

and

tcp.port == 12345 is equivalent to (tcp.srcport == 12345 || tcp.dstport == 12345)

Similarly there are udp.port and sctp.port fields, and probably many others I've never need to use.