LGBT activists are signing up Liberal branch members in the federal seat of Moore in an attempt to counteract the influence of conservative Christian churches in the electorate, according to party sources.

The seat, held by businessman Ian Goodenough since 2013, has been the focus of factional tension within Liberal branches in Perth's northern suburbs, with allegations members of the Joondalup-based Globalheart Church have been signing up large numbers of people in the area.

Moore MP Ian Goodenough in Federal Parliament. Credit:Alex Ellinghausen

A group of about 20 LGBT activists have been organising recruits to the party to bolster branches in Moore opposed to Mr Goodenough.

One Liberal source said Mr Goodenough's personal opposition to same-sex marriage was one of the reasons LGBT Liberal supporters were joining the party.