inviteUsers: UserModel[] = [];
inviteUser: UserModel = new UserModel();

protected addInviteForm() {
    this.inviteUsers.push(this.inviteUser);
    this.inviteUser = new UserModel;
}

protected sendUserInvite() {
    this.inviteUsers.push(this.inviteUser);
    this.xxxSerrvice.sendUserInvite ....
}

<p-dialog header="Nutzer Einladen"
          [(visible)]="displayAddUserDialog" [responsive]="true" *ngIf="user" [modal]="true"
          [width]="800" (onHide)="hideInviteDialog()">
    <div class="ui-g-12 invite-users-form" *ngFor="let invitedUser of inviteUsers">
        <input [disabled]="true" class="ui-g-4 userProfileInput" pInputText type="text"
               placeholder="{{invitedUser.email}}">
        <input [disabled]="true" class="ui-g-2 userProfileInput" pInputText type="text"
               placeholder="{{invitedUser.title}}">
        <input [disabled]="true" class="ui-g-2 userProfileInput" pInputText type="text"
               placeholder="{{invitedUser.firstName}}">
        <input [disabled]="true" class="ui-g-2 userProfileInput" pInputText type="text"
               placeholder="{{invitedUser.lastName}}">
        <input [disabled]="true" class="ui-g-2 userProfileInput" pInputText type="text"
               placeholder="{{invitedUser.role}}">
    </div>


    <div class="ui-g-12">
        <app-corporation-user [user]="inviteUser"></app-corporation-user>
    </div>


    <p-footer>
        <button pButton type="button"
                icon="fa fa-plus" pTooltip="Weitere Einladung Hinzufügen"
                class="ui-button-primary" (click)="addInviteField()">
        </button>
        <button pButton type="button"
                icon="fa fa-paper-plane" label="Einladungen Absenden"
                class="ui-button-primary" (click)="sendUserInvite()">
        </button>
    </p-footer>
</p-dialog>

die app-corporation-user ist die Form dazu ...